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: a pesticide is used for protecting plants by killing insects, Fact2: Pesticides also kill beneficial insects that pollinate flowers and prey upon harmful insects., Question: What is used for protecting plants while killing beneficial pollinators? (A) watering cans (B) dangerous (C) toxins (D) pesticide (E) irrigation (F) exoskeleton (G) steroids (H) plant food
[EX A]: D

[EX Q]: Fact1: Insects may live in large colonies and have complex social behaviors., Fact2: Ants are social insects living in colonies., Question: What type of behavior does an ant have? (A) Randomized (B) Social (C) Solitary (D) dangerous (E) complex (F) Problematic (G) movement (H) kinetic
[EX A]: B

[EX Q]: Fact1: Biodiversity increases the productivity and stability of ecosystems., Fact2: Marine ecosystems also act as stabilizers of global systems especially our climate., Question: What increases the productivity and stability of the entire global system? (A) important habitats (B) Plants growth (C) solar system (D) animals (E) biodiversity (F) environment (G) bottlenecks (H) power stations
[EX A]:
E