An outflow allows sewage to overflow into a river or lake.
a. true
b. false

An outflow allows sewage to overflow into a river or lake. This statement is True. Most of the outflow of the sewage is connected to the rivers before it is then deposited in the ocean. This is the reason why most of the rivers now are contaminated with black toxic materials. It is not already a good habitat for some species.

Yes that is correct answer in 6

Iam pretty sure it is c. 2000 bce