From 1820 to 1850, the largest group of immigrants came to the United States from O France.
O Germany.
O Great Britain.
O Ireland.

I think the answer might be the last one

answer; by working independently, the states have a high likelihood of developing innovative solutions that can be employed in other states;

abolish

do away with

unanimous

in complete agreement

secede

separate; break free

inauguration

starting a new position with a formal ceremony.

cooperationist

people who wanted the north to cooperate with the south

surrender

to give up

volunteer

perform a service for free

draft

involuntary service in military

retreat

withdraw; move away from enemy

advisor

expert who gives advice

explanation: