Modern political science relies heavily on one kind of knowledge, knowledge obtained through _________.

What percentage of African American families live below the poverty line?

a. nearly 10 percent b. nearly 25 percent c. more than 50 percent d. approximately 70 percent

When the trade balance is zero,

a. it means that no foreign countries wish to purchase your exports. b. your country is exporting more than it is importing. c. the economy is importing exactly as much as it exports. d. countries that owe you money for your exports still need to pay up.