Definition: You are given a mathematical question described with an open-ended vocabulary. Questions in this task involve real-world situations, describing a mathematical problem. You are also given 4 or 5 answer options (associated with "A", "B", "C", "D", "E"). Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. LaTeX mathematical format (the standard way to express mathematical expressions in the typesetting software known as LaTeX) is used to express equations. Each question is solvable with high school math knowledge. Give only one answer for each question.
Input: Benjamin and Jerry start with the same number of trading cards. After Benjamin gives 12 of his cards to Jerry, Jerry has two limes as many cards as Benjamin does. How many cards did Benjamin have at the start?
(A)18 (B)24 (C)36 (D)40 (E)42

C