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: a vehicle is used for travel, Fact2: All travel requires navigation in some form or another., Question: A vehicle in use requires (A) specialized (B) strength (C) Communication (D) navigation (E) drinking water (F) heating (G) backbones (H) melanin amount
D