Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

[EX Q]: Problem: the size of a television screen is given as the length of the screen ' s diagonal. if the screens were flat, then the area of a square 19 - inch screen would be how many square inches greater than the area of a square 17 - inch screen ?
Options: a. 36, b. 4, c. 16, d. 38, e. 40
[EX A]: a

[EX Q]: Problem: what is the units digit of 32 ! + 50 ! + 4 ! + 4 ! ?
Options: a. 0, b. 2, c. 4, d. 6, e. 8
[EX A]: e

[EX Q]: Problem: addison high school ’ s senior class has 160 boys and 200 girls. if 75 % of the boys and 84 % of the girls plan to attend college, what percentage of the total class plan to attend college ?
Options: a. 75, b. 79.5, c. 80, d. 83.5, e. 84
[EX A]:
c