Which sentence is punctuated correctly?

Question

(1 point)
Most colleges require one of two things: a high-school diploma or a GED.
Most colleges require one of two things; a high-school diploma or a GED.
Most colleges will accept someone with either: a high-school diploma or a GED.
Most colleges will accept someone with either; a high-school diploma or a GED.

Answer 1

Most colleges require one of two things: a high-school diploma or a GED.