What Affect on the Process of Reapportionment Did the Supreme​

What affect on the process of reapportionment did the Supreme​ Court rulings in the 1960's have?

A) ​required more seats to be allocated to the southern states
B) ​required each state to be equally represented in the House
C) established the "one person, one vote" principle for congressional districts
D) ​required each district cover the same size geographic area
E) ​required the use of gerrymandering in determining district boundaries