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: Evolution is a change in the characteristics of living things over time., Fact2: Evolution relies on random chance acts to cause mutations., Question: What causes changes in characteristics of living things over time? (A) mutations (B) science (C) parents (D) environment (E) light energy (F) news (G) alleles (H) animals

A: A
****
Q: Fact1: if an organism becomes too hot then that organism may die, Fact2: Hot sun can bleach flowers., Question: What can kill flowers? (A) Petals (B) Too much sun (C) cancer (D) Pollination (E) burning (F) dry conditions (G) Pesticides (H) Quality soil

A: B
****
Q: Fact1: treating water is used to remove harmful substances before drinking, Fact2: Hydration is maintained by drinking a lot of fluid., Question: What is treating water to remove harmful substances done before? (A) vaporization (B) bacteria (C) evaporation (D) hydration (E) dangerous (F) Frogs (G) Relieve pain (H) a pathogens

A:
D
****