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What is a controlled experiment? A. one variable is changed at a time B. none of the variables are changed C. all variables are kept constant D. two variables are changed at a time
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What is a controlled experiment?

A. one variable is changed at a time

B. none of the variables are changed

C. all variables are kept constant

D. two variables are changed at a time

User Khelben
by
7.2k points

2 Answers

6 votes
c is becsuse it just souds right
User Sathishvj
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7.1k points
4 votes
A- one variable is changed at time maybe
User Adayzdone
by
7.6k points
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