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").

[EX Q]: Fact1: All chemical reactions require activation energy to get started., Fact2: Fire is a chemical reaction., Question: What does fire require to get started? (A) an engine (B) activation energy (C) water (D) energy usage (E) direct energy (F) dogs (G) activated almonds (H) adding heat
[EX A]: B

[EX Q]: Fact1: cold fronts cause thunderstorms as they pass by, Fact2: If cold air replaces warm air, it is called a cold front., Question: What does cold air replacing warm air cause? (A) Greenhouse gases (B) Pollution (C) Dehydration (D) thunderstorms (E) steady barometer readings (F) hypothyroidism (G) constant air pressure (H) stagnant air temperature
[EX A]: D

[EX Q]: Fact1: Centrioles are organelles involved in cell division., Fact2: Basal bodies function as centrioles., Question: what are basal bodies involved in? (A) Plants growth (B) cell division (C) an organism's body (D) root growth (E) movement (F) permineralization (G) Animal survival (H) animal transport
[EX A]:
B