Detailed Instructions: 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").
Problem:Fact1: a fire requires oxygen to burn, Fact2: They produce oxygen as a by-product of photosynthesis., Question: A fire requires a by-product of what? (A) sunlight (B) heat energy (C) electromagnetic energy (D) photosynthesis. (E) evaporation (F) heating liquids (G) Electrical energy (H) harmful substances
Solution:
D