What were some of the consequences that trade brought new civilization

Which is true about the monroe doctrine?

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.

The event shown in the map is a cause of which of the following? *pic*gadsden purchase battle of the alamo bear flag revolt settlement of texas