Which of the following is the best way to increase the external validity of a study? a. Make sure it is low in psychological realism. b. Conduct the study in the laboratory instead of the field.  c....

Which of the following is the best way to increase the external validity of a study?

a. Make sure it is low in psychological realism.

b. Conduct the study in the laboratory instead of the field.

 c. Replicate the study with a different population of people in a different setting.

d. Make sure you have at least two dependent variables.