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.

Ex Input:
After 4 new people entered the elevator and 2 people left the elevator, there were 2 times as many people as before. How many people were in the elevator before the changes?
(A)1 (B)2 (C)4 (D)6 (E)8

Ex Output:
B


Ex Input:
A gas tank with a capacity of \(g\) gallons is empty. A pump can deliver \(h\) gallons of gas every \(t\) seconds. In terms of \(g\), \(h\) and \(t\), how many seconds will it take this pump to fill the tank?
(A)\(\frac { g } { ht } \) (B)\(\frac { t } { gh } \) (C)\(\frac { gh } { t } \) (D)\(\frac { gt } { h } \) (E)\(\frac { h } { gt } \)

Ex Output:
D


Ex Input:
A coffee shop sold 35 cups of coffee. Of these, 15 contained sugar and 12 contained milk. If 13 cups contained neither milk nor sugar, how many cups must have contained both sugar and milk?
(A)3 (B)5 (C)7 (D)8 (E)12

Ex Output:

B