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Why must everything but the independent
variable stay constant?
A. since a graph can only hold one variable
B. each group should be completely different to do an experiment
C. because you can only record information for one experimental
group
D. because with too many variables you can't determine what
caused the results

Answer :

Other things but the independent variable must remain constant because; with too many variables you can't determine what caused the results.

What is independent variable?

The independent variable is the variable that is changed in an experiment. Recall that every experimebt must have a dependent and independent variable.

Everything but the independent variable must stay constant because because with too many variables you can't determine what caused the results.

Learn more about independent varible: https://brainly.com/question/14356798