Why should scientists control most possible variables in their experiments?

To control the experiment.

To know which variable(s) actually affected the results of the experiment.

To maximize the number of conclusions.

To improve the success of the experiment.

I think it's both A and D but i can only choose one answer.

Question

Why should scientists control most possible variables in their experiments?
		
To control the experiment.
		
To know which variable(s) actually affected the results of the experiment.
		
To maximize the number of conclusions.
		
To improve the success of the experiment.

I think it's both A and D but i can only choose one answer.

anonymous · Answer

The answer is (A) are you in 6th grade  :) :)

anonymous · Answer

@Bambiblob

anonymous · Answer

Ahh thank you and no I was just being sure.

anonymous · Answer

wait so your not :) and thx 4 medal

shadowlegendx · Answer

Both A and B seem correct