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").

Fact1: Most amphibians breathe with gills as larvae and with lungs as adults., Fact2: Frogs are the most durable of the amphibians., Question: How do ost frogs breathe as tadpoles? (A) gills (B) sucking in air (C) oxygen (D) lungs (E) ligt (F) nektar (G) skin (H) ovaries
A