Teacher: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").
Teacher: Now, understand the problem? Solve this instance: Fact1: treating water is used to remove harmful substances before drinking, Fact2: Boiling is the safest method of treating water., Question: What can be done to water to remove harmful substances before drinking? (A) evaporation (B) vaporization (C) Dipping a magnet into it (D) hydration (E) Mixing in heavy metals (F) Cooking (G) Boiling it (H) Adding purified water to it
Student:
G