A(n) _________ Is a Collection Of $10^5$ To $10^6$ Stars in a Region 10 to 30 Pc in Diameter

A(n) _________ is a collection of $10^5$ to $10^6$ stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than $10^9$ years old and mostly yellow and red stars.

A) Herbig-Haro object
B) globular cluster
C) open cluster
D) giant cluster
E) supernova