Q: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Fact1: Plants use unsaturated fatty acids to store energy., Fact2: All oaks are plants., Question: What uses unsaturated fatty acids to store energy? (A) algae (B) humans (C) Trees (D) oaks (E) shrews (F) asses (G) Cane. (H) fens
A:
D