Definition: You are given a question on high school physics. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: A sound wave with frequency f travels through air at speed v. With what speed will a sound wave with frequency 4f travel through the air?
(A)v/4 (B)v (C)2v (D)4v

B