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what essential characteristics does a good experiment have?
A. control group is given the experimental treatment.
B. a single variable is tested
C. a control is used
D. both B and C ​

Respuesta :

Answer:

Answer is both b and c

Explanation:

Good experiments have two essential characteristics: a single variable is tested, and a control is used. The variable is the factor that changes in an experiment in order to test a hypothesis.

CatBee

Answer:

D. both B and C

Explanation:

The control group is not to be altered as to have true results for comparison/differentiation.