Which of the following statements about extraneous variables is not accurate?
a. an extraneous variable can also be a confounding variable.
b. an extraneous variable clarifies the relationship between the independent and dependent variables.
c. an extraneous variable can alter the results of an experiment in an undesired way.
d. an extraneous variable cannot be the same as an independent variable.

I believe the answer is: b. An extraneous variable clarifies the relationship between the independent and dependent variables.

Extraneous variable refers to the variable that is not intended to be included in a certain experiment.

Because it might affect the other variables, The existence of extraneous variable tend to make the relationship between independent and dependent become clouded.

  b.

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