Question

NEED HELP
Why should you use a control during an experiment?

Answer 1

A.to help maintain order
B.to provide a greater certainty that the observed results are not by chance
C.to keep data
D.to have an interesting experiment that is easily repeated

Answer 2

Doing this in control means taking measurements when things do not get as predicted. In other words, you would for instance take measurement at constant time intervals.
As a result, you would be prone to make an efficient and accurate experiments, which matches with the answer B.

Answer 3

B is the perfect selection