A testable question uses multiple approaches as the scientists have different educational backgrounds and experiences. Thus, option A is correct.
A testable question is a problem that can be answered and solved with the help of experimental design and through research studies. It uses the test and variables to compare the result of the experiment with the control group.
It uses multiple approaches to conclude the testable question as the scientists involved may be from various educational backgrounds and differs in experience over the subject work.
Therefore, multiple approaches are used to solve the testable question.
Learn more about the testable questions here:
https://brainly.com/question/6139379
#SPJ1