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: carpooling decreases the amount of cars used to travel to a place, Fact2: Cars are a significant source of air pollution., Question: A beneficial effect of carpooling is (A) animal transport (B) increased water pollution (C) more beneficial emissions (D) reduced air pollution (E) lowered energy cost (F) staying warm (G) lower gas mileage (H) it keeps an organism warm
Student:
D