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:
At Music Outlet the regular price for a CD is \(d\) dollars. How many CDs can be purchased for m dollars when the CDs are on sale at 50\% off the regular price?
(A)\(\frac { m } { 50d } \) (B)\(\frac { md } { 50 } \) (C)\(\frac { md } { 2 } \) (D)\(\frac { m } { 2d } \) (E)\(\frac { 2m } { d } \)
answer:
E


question:
A school's honor society has 100 members: 40 boys and 60 girls, of whom 30 are juniors and 70 are seniors. What is the smallest possible number of senior boys in the society?
(A)0 (B)5 (C)10 (D)15 (E)20
answer:
C


question:
Eduardo drives to school at an average speed of 60 miles per hour and returns along the same route at an average speed of 30 miles per hour. If his total travel time is 3 hours, what is the total number of miles in the round trip?
(A)220 (B)190 (C)120 (D)85.5 (E)60
answer:

C