Which best corrects the run-on sentence? The Big Dipper is a group of seven stars they belong to the constellation Ursa Major.
a. The Big Dipper is a group of seven stars. Belonging to the constellation Ursa Major.
b. The Big Dipper is a group. The seven stars belonging to the constellation Ursa Major.
c. The Big Dipper is a group of seven stars; belonging to the constellation Ursa Major.
d. The Big Dipper is a group of seven stars belonging to the constellation Ursa Major.