Which of the following do you use to check that an answer is reasonable?
a. estimation
b. precision

Option B

Explanation:

To check if an answer is reasonable enough one should check for the accuracy, and in order to check if the answer is accurate and estimation is not an option. Estimation is something like a rough guess, or workings. Estimation in other word can be said to be approximations on certain set of values or data or information.

But, in order to check whether an answer is reasonable or not the best way to know is through the answer's precision, that is to say how precise or how exact the answer is

answer; the trial de novo

answer; evidence; reverseremand;