Pls

the united states refuses to buy a country's products unless it ends a weapons development program.
what tool of foreign policy is this an example of?

a. military intervention
b. alliances
c. economic action
d. diplomacy

The correct answer is:

C. Economic action.

Economic action is the planned use of economic measures meant to influence the policies or actions of another state, as to impair the war-making potential of a hostile power or to generate economic stability within a friendly power. In this example, the economic measure (to refuse a certain trade agreement) points to weaken the war power of another country.

norsemen from northern countries had made earlier journeys

yellow fever and other tropical diseases