The main reason that the southern colonies began importing slaves was - a
they needed more settlers to populate the colonies.
b
they needed workers to clear the forests.
c
they needed labor to farm cash crops.
d
they needed slaves to build railroads

d. migration

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.