Which of the Following Statements About Globular Clusters Is True

Which of the following statements about globular clusters is true?

A) All stars in the cluster are approximately at the same stage in their evolution.
B) Most of the stars in the cluster are younger than 10 billion years.
C) Most stars in the cluster are yellow or reddish in color.
D) All stars in the cluster have approximately the same mass.
E) There is an approximately equal number of all types of stars in the cluster.