Which statement from City contains an opinion?

A."They were still safe and comfortable outdoor areas as originally intended in the master plan."

B."To ensure their hold over [the lands they conquered] Roman soldiers built permanent military camps."

C."[Roman city planners] decided how much water would be needed and the number and size of streets, sidewalks, and sewers."

D."In the following three hundred years [Roman soldiers] created an empire extending from Spain to the Persian Gulf."