A is the correct answer, but it does hide the truth of the matter.
Governor George Wallace did oppose the integration of the University of Alabama because he believed that integration was a state's rights issue.
What this ignores is the reason. George Wallace did believe in state's rights but he was also a noted bigot and segregationist. George Wallace wanted integration to be a State's issue because he did not want the State of Alabama to integrate due to his feelings about African-Americans.