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.

[EX Q]: Question: Today Joelle opened an interest-bearing savings account and deposited $5,000. If the annual interest rate is 5 percent compounded interest, and she neither deposits nor withdraws money for exactly 2 years, how much money will she have in the account?

 Option A: $6512.50

 Option B: $7512.50

 Option C: $5512.50

 Option D: $4512.50

 Option E: $5250.00
[EX A]: Option C

[EX Q]: Question: There are 4 boys and 3 girls seated in a row.Find the probability that all girls are together?

 Option A: 1/6

 Option B: 1/7

 Option C: 2/7

 Option D: 3/7

 Option E: 4/7
[EX A]: Option B

[EX Q]: Question: If the positive integer x is a multiple of 4 and the positive integer y is a multiple of 5, then xy must be a multiple of which of the following?
I. 8
II. 12
III 18

 Option A: II only

 Option B: I and II only

 Option C: I and III only

 Option D: II and III only

 Option E: I, II and III
[EX A]:
Option E