A, B, and C are sisters. D is the brother of E, and E is the daughter of B. How is A related to D?

Introduction / Context:This family-logic item links siblings across two generations. The key is to recognize that if E is B’s daughter and D is E’s brother, then D is also B’s child. Since A, B, C are sisters (same generation), A’s relation to B’s child D follows directly as an aunt–nephew/niece relation.

Given Data / Assumptions:

• A, B, C are sisters (same generation).
• E is the daughter of B (so E is B’s child).
• D is the brother of E (so D is also a child of B).
• No half-/step- qualifiers are provided; assume standard full relations.

Concept / Approach:Build a minimal family tree. One parent B has two children: E (daughter) and D (son). A is B’s sister. Therefore, A is the maternal aunt of E and D. The asked relation is specifically from A to D, which is “aunt.”

Step-by-Step Solution:

Verification / Alternative check:No other roles fit better: “sister” would require A and D to share parents; “cousin” would require A and B to be in the same generation but with different parents and D to be on a lateral branch of A’s generation, which is not the case here—D is one generation below B and A. “Niece” is reversed (would describe D’s view of A if D were female); the puzzle asks how A is related to D.

Why Other Options Are Wrong:

• Sister: Different generations.
• cousin: Cross-generation mismatch.
• Niece: Reverse direction (D would be A’s nephew).
• None of these: Not needed; “Aunt” fits exactly.

Common Pitfalls:

• Confusing “how A is related to D” with “how D is related to A.”
• Overlooking that siblings of a parent are aunts/uncles.

Final Answer:

Aunt