Which of the following best describes why trade among the colonies flourished? a. the different regions specialized in different crops. b. the colonies had developed large fleets of trading ships. c. exsiting trade routes were well-maintained by native americans. d. colonies were founded with specific trade agreements in place.

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

to act quickly in times of danger to the united states

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