Given the task definition and input, reply with output. 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").

Fact1: dehydrating food is used for preserving food, Fact2: Dehydration is the removal of water., Question: What can be removed to preserve food? (A) water (B) nutrients (C) toxins (D) salt (E) A virus (F) sugar (G) leeches (H) peat
A