Help it is easy I think Why must scientific investigations be replicable?

A ) to prove the reliability of the results

B)to confirm ideas and theories

C)to prove its validity within the scientific community

D)to improve the investigation each time

Answervis A.

Explanation:

Because,so that other scientists can validate the results.

I hope it's helpful!

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current