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: killing microorganisms in food can be used to extend the shelf life of that food, Fact2: Irradiation kills microorganisms that spoil food., Question: What can be used to extend the shelf life of food? (A) irradiation (B) farming (C) Dehydration (D) rays or beams (E) vegetables (F) Cooking (G) Enzymes (H) fruit
A:
A