Aconstant-cost industry is one in which
- the long-run supply curve is perfectly inelastic.
- the long-run supply curve is downward sloping.
- the long-run supply curve is upward sloping.

None of the given option is correct.

Explanation:

A constant cost industry will have a perfectly elastic long-run supply curve. This is because in such industry the cost of inputs does not increase with the increase in demand. As a result, the increase in input level will not cause a rise in the price of factors or inputs.  

When the price of inputs remains the same, the cost curve, in the long run, will be a horizontal line.

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.