Which of the following is a result of the increase in trade during the high middle ages?

a.
lords gained greater power.

b.
the feudal system remained important.

c.
towns grew and prospered.

d.
the population declined.

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.

thing is, i'm afraid, you can't.

the most you can do is log out and never log in again.