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.

[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)\(\frac { 120p } { k } \)
[A]: D


[Q]: If \(p\) gallons of 10 percent antifreeze solution is added to \(q\) gallons of 20 percent antifreeze solution, what is the percent antifreeze of the resulting solution in terms of \(p\) and \(q\)?
(A)\(\frac { p + q } { 2 } \) (B)\(\frac { 10p + 20q } { 30 } \) (C)\(\frac { 10p + 20q } { p + q } \) (D)\(\frac { 10p + 20q } { 100 } \) (E)\(\frac { 100p + 200q } { p + q } \)
[A]: C


[Q]: What was the initial amount of water in a barrel, in liters, if there are now x liters, y liters were lost, and 6 liters were added?
(A)\(x + y - 6\) (B)\(y - x + 6\) (C)\(x + y + 6\) (D)\(y - x - 6\) (E)\(x - y + 6\)
[A]:
A