Tallest building: Four buildings A, B, C, D have distinct heights. A is only higher than D. B is shorter than C but higher than A. Which building is the highest?

Introduction / Context:
We are to find the maximum (tallest) in a partially ordered set of four items using concise comparative statements.

Given Data / Assumptions:

• A is only higher than D ⇒ A > D and A < (B, C).
• B is shorter than C but higher than A ⇒ C > B > A.
• All heights are distinct.

Concept / Approach:
Combine the inequalities: C sits above B, which sits above A, which sits above D. Therefore, C is the tallest and D is the shortest.

Step-by-Step Ordering:

Verification / Alternative check:
Every original relation is satisfied by C > B > A > D.

Why Other Options Are Wrong:

• A, B, D: Not the maximum in the derived chain.
• None of these: A specific correct choice exists (C).

Common Pitfalls:
Misinterpreting “only higher than D” (it fixes A exactly one place above D and below the other two).

Final Answer:
C