Research Designs Involving Random Assignment Allows an Investigator to ____

Research designs involving random assignment allows an investigator to ____.

A) have confidence that differences found in the study are due to differences in treatment
B) have confidence that differences found in the study are due to differences in the individual characteristics of member of each research group
C) have confidence that differences found in the study are due to the impact of sociopolitical factors
D) have confidence that differences found in the study are due to cultural dimension that affect participants' perceptions