Answer:
Double blind study
Explanation:
A double-blind investigation is one in which neither the members nor the one performing the experiments realize who is getting a specific treatment.
This method is used to counteract inclination in research results.
Double blind examinations are especially helpful for anticipating predisposition because of interest qualities or the placebo impact.
Your nails are made with Keratin. ☺
C is the correct answer as your absolute strength is the most force you can create in 1 effort while relative strength is the strength relative to your size, i hope this helped!
He should go online and read an article about it and do his Research on land pollution
