In an Experiment, the Main Difference Between Internal Validity and External

Multiple Choice

In an experiment, the main difference between internal validity and external validity is that

A) external validity concerns the degree to which the experiment supports clear causal conclusions, whereas internal validity concerns the generalizability of the results
B) internal validity concerns the degree to which an experiment supports clear causal conclusions, whereas external validity concerns the generalizability of the results
C) internal validity is based on random sampling, whereas external validity is based on random selection
D) internal validity is based on random selection, whereas external validity is based on random sampling