Definition: You are given a question on philosophy. 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: Kant claims that the natural purpose of reason is to:
(A)produce happiness. (B)produce pleasure. (C)produce knowledge. (D)produce a good will.

D