Definition: 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").
Input: Fact1: Cells vary in size as well as shape, but all cells are very small., Fact2: All cells are microscopic in size., Question: What varies in shape but are all microscopic? (A) alveoli (B) small (C) ovaries (D) cells (E) bushes (F) ferns (G) fossils (H) fungi
Output:
D