TASK 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").
PROBLEM: Fact1: hydropower requires damming a river, Fact2: Another source of energy is hydropower., Question: What is a source of energy? (A) fossil fuels (B) cooking (C) damming a river (D) sleeping (E) napping (F) Electrical energy (G) our nearest star (H) sunlight

SOLUTION: C

PROBLEM: Fact1: global warming is when worldwide temperature increases, Fact2: Global warming is caused by carbon dioxide trapped in the atmosphere., Question: What does carbon dioxide cause? (A) skateboards (B) Greenhouse gases (C) Worldwide temperature increase (D) major threat to health (E) direct damage to the lungs (F) running (G) a lot of human deaths (H) Temperature decrease

SOLUTION: C

PROBLEM: Fact1: Lymphocytes are the key cells involved in the immune response., Fact2: B lymphocytes produce antibodies ., Question: The cells that produce antibodies are key in what system? (A) health (B) T cells (C) vision (D) humans (E) macrophages (F) B cells (G) disease (H) immune

SOLUTION:
H