In this context, what does the author mean by saying that
age cannot be an "independent variable"?
A It is impossible to isolate the effects of age alone.
B
Chronological age alone can affect student
performance.
с
Age can be examined independently in
experimental research.
D
Your true age cannot be known because it is
independent from your chronological age.

The thing that the author mean by saying that age cannot be an "independent variable" is D. Your true age cannot be known because it is independent from your chronological age.

What is an independent variable?

An independent variable simply means a variable that an be changed and controlled on the experiment.

In this case, the thing that the author mean by saying that age cannot be an "independent variable" is that your true age cannot be known because it is independent from your chronological age.

Learn more about an independent variable on:

https://brainly.com/question/82796

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