Definition: You are given a question on high school microeconomics. 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: Which of the following will increase wages for tuba makers?
(A)An increase in the number of graduates at tuba maker training school (B)An increase in the price of tubas (C)An increase in the price of tuba lessons (D)An increase in the tax on tubas

B