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: gills are used for breathing water by aquatic animals, Fact2: Crustaceans are predominantly aquatic, breathing by means of gills., Question: Crustaceans breathe what through their gills? (A) matter (B) water (C) saliva (D) gametes (E) semen (F) liquid (G) oxygen (H) air
Student:
B