Question

What is the purpose of using multiple control groups in an experiment?

A. To help you identify the substance that you spilled on the floor
B. To help you determine that your experimental results are valid
C. To provide more work so that you look busy when doing experiments
D. To ensure that no experimental subjects escape the maze

Answer 1

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HERE IS YOUR ANSWER,

D. To ensure that no experimental subjects escape the maze.

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Answer 2

Answer:

HERE'S YOUR ANSWER

[A] To help you identify the substance that you spilled on the floor.

Explanation: