Answer:
B. Basic systems needed to support a society, such as roads and a water supply
Here's a reason why: Africans were strangers to the Americans. Because the Africans were poor, they didn't have any allies to watch out for them or to protect them.
Because Dr. Borlaug’s work significantly increased agricultural yields in Mexico and India.
In ancient India, the Kshatriyas were the responsible for fending off intruders.
