Multiple Choice
In a controlled experiment,____________.
A) the researcher has several hypotheses, one of which will be proven correct
B) you need only a single experimental organism which is tested again and again
C) the researcher knows the outcome before beginning the experiment
D) the researcher controls for the effects of only one variable
E) the researcher controls for the effects of all variables except one
Correct Answer:
Verified
Correct Answer:
Verified
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