What was the biggest challenge in foreign policy facing us presidents in the 1990s?

a. the fall of soviet communism

b. the rise of unilateralism

c. the terrorist attacks on the united states

d. the development of china's military

i believe the answer to your question is b. pay your bills early

sonar maybe? ? i dont know the choices

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b