Question

why did plastic bags become popular? they were made by a famous engineer. they could be made from trees. they were good for the environment. they made it easier to carry groceries.

Explanation:

Plastic bags became popular mainly because they offered convenience in carrying groceries. They were not made by a single famous engineer, not made from trees (they are made from petroleum - based products), and are not good for the environment.

Answer:

D. They made it easier to carry groceries.