At the 2017 Academy Awards, which film finally received the Oscar for Best Picture after an initial on stage mix up?

Introduction / Context:
This question focuses on a famous incident at the Academy Awards, commonly known as the Oscars. In 2017 there was a widely reported mix up when the wrong film was initially announced as Best Picture before the error was corrected on stage. The question asks for the film that actually received the Oscar for Best Picture.

Given Data / Assumptions:

• The event is the Academy Awards ceremony in 2017.
• The category is Best Picture.
• There was an initial mistake where one film was incorrectly announced.
• The options list several nominated films from that awards season.

Concept / Approach:
The candidate must recall that La La Land was first wrongly announced as the winner. Shortly afterwards, the presenters and producers corrected the mistake and declared Moonlight as the actual Best Picture winner. Understanding this high profile event helps in eliminating the distractors and choosing the correct film.

Step-by-Step Solution:
Step 1: Recall the famous Oscars mix up where the envelope for Best Picture was mishandled. Step 2: Remember that La La Land was initially announced as Best Picture, and the cast even came on stage to accept the award. Step 3: Then the mistake was corrected and the producers announced that the true Best Picture winner was Moonlight. Step 4: Check the options and identify Moonlight among them. Step 5: Confirm that Moonlight, not La La Land, is recognised in records as the Oscar winning film for Best Picture that year.

Verification / Alternative check:
An alternative way to verify is to recall that Moonlight is a drama about the life of a young African American man, and its win was widely discussed as a landmark in Oscar history. News reports repeatedly mentioned that Moonlight made history and that the ceremony would be remembered for the error and the correction on stage. La La Land, while highly awarded in other categories, is not listed officially as the Best Picture of that year.

Why Other Options Are Wrong:
La La Land was mistakenly announced as Best Picture but did not ultimately receive that award. Arrival, Fences and Manchester by the Sea were all critically acclaimed films and received nominations and some other awards, but none of them won the Best Picture Oscar in that year. They are therefore distractor options meant to test whether candidates recall the precise outcome.

Common Pitfalls:
A major pitfall is to remember only the initial mistaken announcement and therefore choose La La Land, ignoring the correction that followed. Candidates who only heard part of the story might not know that Moonlight was the true winner. Others may simply guess based on popularity instead of carefully recalling the exact event.

Final Answer:
The film that finally received the Oscar for Best Picture at the 2017 Academy Awards was Moonlight.