The use of slavery in Rome had a negative effect because it led to-- * A decision to conquer less territory

A lack of cultural and technological advancements since the Romans did not need to
produce technology to make life easier

Massive slave revolts which eventually brought down the government

Conflict between parts of the empire as they each competed for slaves

I believe the answer id the third one, C

Explanation:

In Rome, most slaves were highly educated, they began to think and refuse unfairness and wanted freedom. When you force people to do something against their will, they began to fight back and revolt.

donald carl johanson (born june 28, 1943) is an american paleoanthropologist. he is known for discovering – with yves coppens and maurice taieb – the fossil of a female hominin australopithecine known as "lucy" in the afar triangle region of hadar, ethiopia.

hope this !

i googled "who was kolson johanson" and this is the answer i found.

sorry if this is incorrect.