You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Input: Consider Input: Question: find two integers, neither of which ends in a zero, and whose product is exactly 10,000

Option A: 64 and 15,625

Option B: 60 and 15,625

Option C: 64 and 15,620

Option D: 16 and 625

Option E: 64 and 16,625

Output: Option D

Input: Consider Input: Question: If each of 4 digit code is formed of integers from 1 to 50, inclusively, and each of the digits are different, how many possible codes are there?

Option A: 5527200

Option B: 5586300

Option C: 5598600

Option D: 5547800

Option E: 2569800

Output: Option A

Input: Consider Input: Question: What is 10-8+6-4+...+(-10)?

Option A: 0

Option B: 5

Option C: 2

Option D: 14

Option E: 16
Output: Option A