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.

Input: Consider Input: Problem: if s is the sum of reciprocals of a list of consecutive integers from 55 to 64, inclusive, s is approximately equal to
Options: a. 0.16, b. 0.2, c. 0.3, d. 0.4, e. 0.5

Output: a

Input: Consider Input: Problem: in 10 years, a will be twice as old as b was 10 years ago. if a is now 5 years older than b the present age of b is
Options: a. 37, b. 38, c. 39, d. 35, e. 41

Output: d

Input: Consider Input: Problem: a caterer ordered 125 ice - cream bars and 125 sundaes. if the total price was $ 225.00 and the price of each ice - cream bar was $ 0.60, what was the price of each sundae ?
Options: a. $ 0.60, b. $ 0.80, c. $ 1.00, d. $ 1.20, e. $ 1.60
Output: d