Identify the part (A–E) that contains a grammatical error in the sentence below. If there is no error, choose option E (No error). Sentence (split into parts): A) Why some people don't get B) what they deserve C) and why others get what they don't deserve D) is a matter decided by luck.

Introduction:
This sentence features a complex subject made of two parallel wh-clauses joined by "and". The question is whether any part violates grammar or agreement rules.

Given Data / Assumptions:

• Two wh-clauses: "why some people don't get what they deserve" and "why others get what they don't deserve".
• Predicate: "is a matter decided by luck."
• Parallel structure intended.

Concept / Approach:
When a content clause acts as a singular idea (the entire phenomenon of fairness vs luck), a singular verb is acceptable. Parallelism is maintained and contractions are grammatically fine in informal registers.

Step-by-Step Solution:
1) Confirm parallelism: both halves begin with "why".2) Verify objects: "what they deserve" / "what they don't deserve" are correct.3) Check agreement: The whole clausal subject can take a singular verb "is" (treating it as a single issue).4) No faulty prepositions, articles, or tense issues appear.

Verification / Alternative check:
Stylistic alternative: Replace contractions with full forms; grammar remains correct either way.

Why Other Options Are Wrong:
A–D: Each segment is grammatically sound and coherent; no correction is required.

Common Pitfalls:
Assuming compound subjects made of clauses must always take plural verbs. Here the compound expresses one phenomenon.

Final Answer:
E (No error)