Which of the following sentences uses the correct punctuation?

Question

A.
Always look both ways before crossing the street, or you could get run over by a car.

B.
Always look both ways before crossing the street or you could get run over by a car.

C.
Always look both ways before crossing the street. Or you could get run over by a car.

D.
Always look both ways before crossing the street; or you could get run over by a car.

Answer 1

C.
Always look both ways before crossing the street. Or you could get run over by a car.