Which of the following statements about a globular cluster is true?
A) All stars in the cluster are approximately at the same stage in evolution.
B) Most of the stars in the cluster are younger than 10 billion years old.
C) Most stars in the cluster are yellow or reddish in colour.
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.
Answer: C