If the price of a good rises, then:

a.

existing sellers will expand but more sellers will not enter a market.

b.

more sellers will enter a market but existing sellers will not expand.

c.

more sellers will enter a market and existing sellers will expand.

d.

more sellers and more buyers will enter a market.

Which of the following is TRUE?

a.

Trade based on comparative advantage usually benefits some countries and hurts others.

b.

Trade based on comparative advantage only benefits countries that also have an absolute advantage.

c.

Trade based on absolute advantage can always benefit all countries involved.

d.

Trade based on comparative advantage can always benefit all countries involved.