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: Chemical changes are a result of chemical reactions., Question: What is required before a chemical change? (A) kinetic energy (B) energy usage (C) activation push (D) activation energy (E) activation switch (F) activation power (G) Burning fuel and air (H) Evaporation
[EX A]: D

[EX Q]: 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
[EX A]: C

[EX Q]: Fact1: Cell division is more complex in eukaryotes than prokaryotes., Fact2: Asexual cell division is called Mitosis., Question: What is more complex in eukaryotes than in prokaryotes? (A) plants (B) cell immigration (C) cell establishment (D) pollen (E) explosions (F) mitosis (G) A computer (H) orchids
[EX A]:
F