because america was doing so well and getting so much new territory, the biggest obstacle was themselves. with the new territory, the balance of free and slave states grew tension among american and resulted in the civil war
Letter A should be the answer. Clinton expresses his opinions about immigrants really positively so he believes they have a positive effect on the nation.
The main reason why the Spanish built the St. Augustine fort in Florida was "to protect their sea route to the Caribbean" since this was a crucial port for many engaged in trade within the Caribbean.
