You are given a mathematical question described with a circumscribed mathematical vocabulary. Questions in this task usually contain some variables (e.g. X, Y), equations (e.g. X+Y=3) and some relationships (X is greater than Y). Often you need to find the value of the variable using equations and relationships. 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.

Example Input: What is the sum of 15 consecutive integers if the middle integer is 60?
(A)45 (B)90 (C)450 (D)500 (E)900
Example Output: E

Example Input: If the average (arithmetic mean) of 9 different positive integers is 15 and the median is 20, what is a possible value of the greatest of the 9 integers?
(A)99 (B)75 (C)39 (D)30 (E)28
Example Output: C

Example Input: How many different positive two-digit integers are there such that the tens digit is greater than 5 and the units digit is odd?
(A)10 (B)12 (C)15 (D)20 (E)25
Example Output:
D