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.

[Q]: Problem: what is the smallest number by which 2880 must be divided in order to make it into a perfect square ?
Options: a. 3, b. 4, c. 5, d. 6, e. 7
[A]: c


[Q]: Problem: the average weight of a group of persons increased from 48 kg to 51 kg, when two persons weighing 78 kg and 93 kg join the group. find the initial number of members in the group ?
Options: a. 87, b. 67, c. 23, d. 75, e. 25
[A]: c


[Q]: Problem: here 10 programmers, type 10 lines within 10 minutes then 60 lines can type within 60 minutes. how many programmers are needed ?
Options: a. 16, b. 10, c. 6, d. 60, e. 50
[A]:
d