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.

Question: A lady bought five books namely A,B,C,D,E to distribute her 7 friends. How many ways she can distribute books?

 Option A: 7^3

 Option B: 7^4

 Option C: 7^5

 Option D: 7^6

 Option E: 7^2
Option C

Question: Patrick purchased 80 pencils and sold them at a loss equal to the selling price of 16 pencils. The cost of 80 pencils is how many times the selling price of 80 pencils?

 Option A:  0.75

 Option B:  1.2

 Option C:  1.8

 Option D:  2.4

 Option E:  4.25
Option B

Question: Which of the following is equal to the value of 2^4 + 2^4 + 3^4 + 3^4 + 3^4 ?

 Option A: 2^5 + 3^10

 Option B: 2^5 + 3^9

 Option C: 2^5 + 3^8

 Option D: 2^5 + 3^5

 Option E: 2^5 + 3^7

Option D