I think the answer is false.
Irrigation machinery has QUADRUPLED the amount of irrigated land in the US.
If you travel from Tallahassee, the capital of Florida to Atlanta, the capital of Georgia, you will be moving to a north direction. On the maps you can easily see that they are positioned in an almost straight north-south line. Atlanta on the north, while Tallahassee on the south.
I believe the answer is c.