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: Phytoplankton are bacteria and algae that use sunlight to make food., Fact2: Plants have a very clever way of using the energy from sunlight to make their food., Question: Phytoplankton have a clever way of making food from what? (A) sunlight energy (B) water energy (C) heat energy (D) heat produced (E) chemical energy (F) mechanical energy (G) organic matter (H) refraction of light
Output:
A