instruction:
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.
question:
Stephanie, Damon, and Karissa have been contracted to paint an office building that contains 72 rooms. If Stephanie paints half as many rooms as Karissa and 12 more than Damon, how many rooms does Karissa paint?
(A)9 (B)21 (C)30 (D)42 (E)48
answer:
D

question:
The charge for the first quarter-mile of a taxi ride is \$1.40, and charge for each additional quarter-mile is \$0.20. If the total charge for a certain taxi ride is \$5.00, what is the length of this ride, in miles?
(A)\(4
rac { 1 } { 2 } \) (B)\(4
rac { 3 } { 4 } \) (C)\(5
rac { 1 } { 2 } \) (D)19 (E)25
answer:
B

question:
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
answer:
C