Answer:
Option: a is the correct answer.
a. if your answer is reasonable, you have probably done the problem correctly.
Step-by-step explanation:
Checking for reasonableness is a process by which students evaluate estimations to see if they are reasonable guesses for a problem.
So, a good idea to check to see if your answer is reasonable is:
a. if your answer is reasonable, you have probably done the problem correctly.
( Since a reasonable answer is just a estimation of the problem it can't be claimed to be true but it is just a probable estimation ).
