Question

Which option describes a step in designing an experimental investigation?

O A. Identifying the variables that will be controlled for all experimental groups B. Writing a procedure that prevents other scientists from repeating the results C. Making sure that the hypothesis will be supported and not refuted O D. Collecting each piece of data in a different way so that there is more variety​

Answer 1

A. identifying the variables that will be controlled for all experimental groups

Step-by-step explanation:

it is ;)

Answer 2

a

Step-by-step explanation:

because i studied like tht