Which statement from city contains an opinion?
a."[roman city planners] decided how much water would be needed and the number and size of streets, sidewalks, and sewers."
b."they were still safe and comfortable outdoor areas as originally intended in the master plan."
c."in the following three hundred years [roman soldiers] created an empire extending from spain to the persian gulf."
d."to ensure their hold over [the lands they conquered] roman soldiers built permanent military camps."