southern plantation owners in the colonial era could not depend on using indentured servants for labor because
a)there was no reason for them to come to the colonies.
b)there was an uncertain supply of workers.
c)the workers knew they would never be free.
d)the workers would not be able to become property owners.

B. There was an uncertain supply of workers.

Explanation:

Indentured servants (people who worked for X amount of years under a contract) would be free after their contract was up. The number of workers was always unstable, and that's when slavery began.

Sorry that this is late!

the answer is b.

hope this !

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.