Total output in an economy increases when each person specializes because
a. there is less competition for the same resources.
b. each person spends more time producing that product in which he or she has a comparative advantage.
c. a wider variety of products will be produced within each country due to specialization.
d. government necessarily plays a larger role in the economy due to specialization.

The answer is: C) each person spends more time producing that product in which he or she has a comparative advantage.

Explanation:

If a person wants to specialize on something, they will spend more time doing the task they are expert in.

If a country (or an economy) specializes in products or services for which it holds a comparative advantage, they benefit from economies of scale. Their average cost of production declines as output increases. More  

the correct answer is:

it required the president to inform congress within forty-eight hours of any new troop commitment.

the war powers resolution (1973) is a federal law designed to limit the u.s. president’s ability to initiate or intensify military actions abroad without the approval of the congress.

it establishes that the president can send armed forces into action abroad only by declaration of war by congress, statutory authorization, or in case of a national emergency created by attack upon the united states, its territories or possessions, or its armed forces.

it requires the president to notify congress within 48 hours of sending armed forces to military action.