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]: In a display consisting of one row of coins, there are an equal number of silver and gold coins. Which of the following must be true?
(A)The first coin and the last coin are different types. (B)There are two adjacent gold coins in a row. (C)There are two adjacent silver coins in a row. (D)If there are two adjacent silver coins, there are also two adjacent gold coins. (E)If the last two coins are gold, there are at least two adjacent silver coins.
[EX A]: E

[EX Q]: Beth has twice as many baseball cards as Bruce. If Beth has \(b\) cards, how many cards does Bruce have?
(A)\(2b\) (B)\(b^2\) (C)\(\frac { b } { 2 } \) (D)\(\frac { 2 } { b } \) (E)\(b + 2\)
[EX A]: C

[EX Q]: Let X represent the average (arithmetic mean) of a list of test scores. What is the result of multiplying X by the number of scores?
(A)The average of the scores (B)The highest score (C)The number of scores (D)The number of possible scores (E)The sum of the scores
[EX A]:
E

