What are the most important considerations when selecting and testing a solution

It is usually best to try only one solution at a time. And it is important to specify what a successful outcome is oh, how the outcome will be measured, as well as the length of time a solution will be tried before making a judgment. Additional Solutions can then be tried until a successful outcome is achieved.

Explan :  This answer was correct on EDGE 2021

the answer is c  

Explanation:

this is a weird question