Central american countries are known for their export of
a. beef and cattle
b. cash crops, such as fruit and coffee
c. petroleum
d. electronics, such as televisions

When you think of Central American export, you might remember buying Costa Rican or Nicaraguan Coffee or chocolate - this suggests to us that the answer b) is correct.

And in fact, the other options do not describe a typical Central American export.

The answer is b. increased blood flow reduces nerve sensitivity