Answer:
d. dark ages if i'm wrong i'm sorry
Explanation:
In the late 1800s, the growth of the railroad system led Midwestern cities such as Minneapolis and Cleveland to become industrial centers.
Turnpike had it on my test like five minutes ago
A mark or character used as a conventional representation of an object, function, or process, e.g. the letter or letters standing for a chemical element or a character in musical notation.
