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.
--------
Question: 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

Answer: a

Question: Problem: how many integers are between 6 and 74 / 5, inclusive ?
Options: a. 4, b. 5, c. 6, d. 7, e. 9

Answer: e

Question: Problem: 45 workers work 8 hours to dig a hole 30 meters deep. how many extra workers should be hired to dig another hole 55 meters deep by working for 6 hours ?
Options: a. 50, b. 55, c. 60, d. 65, e. 70

Answer:
d