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 Q]: Aaron scored 84 points on a test made up of 10 eight-point short-answer questions and 8 five-point multiple-choice questions. If no partial credit was given and he missed 2 short-answer questions, how many questions did Aaron miss on the whole test?
(A)6 (B)10 (C)11 (D)12 (E)20
[EX A]: A

[EX Q]: The probability of choosing a black marble from a jar containing only black and red marbles is \(\frac { 1 } { 4 } \). Which of the following could be the number of red marbles?
(A)20 (B)22 (C)24 (D)32 (E)35
[EX A]: C

[EX Q]: The cost of k pieces of candy is \$1.20. At this rate, what is the cost in dollars of p pieces of this candy?
(A)\(1.2p\) (B)\(1.2kp\) (C)\(\frac { 1.2k } { p } \) (D)\(\frac { 1.2p } { k } \) (E)\(\frac { 120p } { k } \)
[EX A]:
D