Which statement describes a negative impact of nafta?

a. tariffs increase.

b. the price of goods rises.

c. small businesses find it harder to compete.

d. trade increases between member countries.

A. Tariffs increase.  

Explanation:

This is due to the asymmetric nature of tariffs - their significantly higher level for imports compared with the country's exports and a significant excess of non-tariff, especially border, barriers in comparison with tariff barriers, which weakens the effect of tariff liberalization.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.