What Was Nixon's Southern Strategy

What was Nixon's southern strategy?

A) North Vietnam could be defeated by capturing its southern provinces only.
B) For the American economy to recover from stagflation, it had to look to the Southern hemisphere for new export opportunities.
C) The scientific and technological edge of the United States had to be developed in the Sunbelt States in the south.
D) By opposing forced school integration in southern states, he could shatter the Democratic party base there and make the American South staunchly Republican.