How can it be determined if an experiment is valid?
A) The observed change in the dependent variable is in fact due to the independent variable.
B) The results of the experiment apply to the real world outside the experimental setting.
C) The results do not account for the effects of extraneous variables.
D) Both A and B are correct.
E) A, B, and C are correct.
Answer: D) Both A and B are correct.