At the 2016 Grammy Awards, which album won the Rap Album of the Year honour (Best Rap Album)?

Introduction / Context:
Rap and hip hop are major categories at the Grammy Awards, and the Best Rap Album (often informally called Rap Album of the Year) is one of the most respected honours in this genre. This question tests your knowledge of the 2016 Grammy Awards by asking which album took home the Best Rap Album award in that year.

Given Data / Assumptions:

The year is the 2016 Grammy Awards, corresponding to the 58th Annual Grammy ceremony.
The category is Rap Album of the Year or Best Rap Album.
Four well known rap albums are listed as options.
One and only one of these albums actually won the Grammy in this category for that year.

Concept / Approach:
To solve this, we rely on awareness of landmark albums and their recognition. At the 2016 Grammy Awards, Kendrick Lamar's album To Pimp a Butterfly, known for its powerful themes and innovative sound, won the Grammy for Best Rap Album. Other albums like Compton by Dr. Dre, 2014 Forest Hills Drive by J. Cole and The Pinkprint by Nicki Minaj received attention and nominations, but they did not win this particular award at that ceremony. Correctly linking each album to its award history is the key approach.

Step-by-Step Solution:
Step 1: Focus on the 2016 Grammy Awards and the category Best Rap Album. Step 2: Recall that To Pimp a Butterfly by Kendrick Lamar was widely considered a landmark album and was rewarded with the Grammy for Best Rap Album in 2016. Step 3: Examine the options given: Compton, 2014 Forest Hills Drive, To Pimp a Butterfly and The Pinkprint. Step 4: Recognise that Compton, 2014 Forest Hills Drive and The Pinkprint did not win Best Rap Album that year, although they are significant releases by major artists. Step 5: Select To Pimp a Butterfly as the correct and only album that matches the award description for 2016.

Verification / Alternative check:
To verify, remember that the 2016 Grammys featured a strong showing by Kendrick Lamar, who won multiple rap category awards. News reports described To Pimp a Butterfly as highly decorated, with the Best Rap Album award being one of its major wins. In contrast, 2014 Forest Hills Drive by J. Cole and The Pinkprint by Nicki Minaj, though popular and critically noted, did not secure this top rap album award at that ceremony. Cross checking with official winner lists confirms that To Pimp a Butterfly holds the Best Rap Album title for 2016.

Why Other Options Are Wrong:
Compton: This album by Dr. Dre was significant but did not win the Best Rap Album award in 2016.
2014 Forest Hills Drive: A critically acclaimed album by J. Cole, yet it was not the recipient of the Best Rap Album award at the 2016 Grammys.
The Pinkprint: This album by Nicki Minaj may have been nominated or discussed in award contexts, but it did not win Best Rap Album in 2016, so it is not the correct answer.

Common Pitfalls:
One common error is to assume that the most commercially visible or frequently discussed album among the options automatically won the award. Another issue is to confuse year numbers because album release dates and award ceremony dates do not always match perfectly. To avoid these pitfalls, focus on the specific year and category stated in the question and try to associate each major album with its real award history rather than with popularity alone.

Final Answer:
The album that won the Rap Album of the Year honour at the 2016 Grammy Awards is To Pimp a Butterfly.