Suppose That a Study Finds a Causal Relationship Between Two

Suppose that a study finds a causal relationship between two variables.The study has external validity if its findings:

A) are derived entirely from valid deductive arguments
B) are derived entirely from valid inductive arguments
C) apply only to the individuals that were studied
D) apply to the general population and not merely to the individuals that were studied
E) are generally accepted by the mathematical and scientific communities