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 and B rent a pasture for 10 months. A put in 80 cows for 7 months. How many can B put in for the remaining 3 months, if he pays half as much again as A?

 Option A: 388

 Option B: 277

 Option C: 266

 Option D: 280

 Option E: 191
Option D

Question: The difference between the place values of 7 and 3 in the number 527435 is

 Option A: 4

 Option B: 5

 Option C: 45

 Option D: 6970

 Option E: None
Option D

Question: x is what percent of y percent of z, in terms of x, y and z? p be the value expressed in terms of x,y and z.

 Option A: xyz

 Option B: 1/xyz

 Option C: 10,000x/yz

 Option D: 1000*xyz

 Option E: 100x/yz

Option C