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: magnetism can cause objects to repel each other, Fact2: Opposite charges repel., Question: What can cause objects to have opposite charges? (A) Temperature (B) frozen water (C) heat energy (D) magnetism (E) polar winds (F) ship captains (G) voltage (H) Light
Student:
D