An Astronomer Studies Two Globular Clusters,A and B

Multiple Choice

An astronomer studies two globular clusters,A and B.Cluster A has a higher metallicity than cluster B,but their properties are otherwise identical.The astronomer should expect that:

A) cluster A's main sequence turnoff occurs at a higher mass than cluster B.
B) cluster A is more distant than cluster B.
C) cluster A is older than cluster B.
D) cluster A is more massive than cluster B.