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").
Q: Fact1: burning fossil fuels increases the carbon in the atmosphere, Fact2: An increase in carbon dioxide, therefore, can cause an increase in the temperature of the lower atmosphere., Question: What can can cause an increase in the temperature of the lower atmosphere? (A) solar flares (B) burning fossil fuels (C) gas expanding (D) Dehydration (E) Warm air moving into cold air (F) radio waves (G) Greenhouse gasses (H) Greenhouse gases
A:
B