Detailed Instructions: 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").
Problem:Fact1: treating water is used to remove harmful substances before drinking, Fact2: Boiling is the most reliable way to treat contaminated water., Question: Boiling can make water less what to drink? (A) germs (B) safe (C) energy (D) pure (E) harmful (F) dangerous (G) wet (H) heat
Solution:
E