If Astronomers Plotted the Stars in a Young Star Cluster

If astronomers plotted the stars in a young star cluster on a Hertzsprung-Russell diagram, they would expect to see

A) all the stars on the main sequence.
B) the more massive stars above the main sequence and the less massive stars on the main sequence.
C) some stars on the main sequence and others above the main sequence, in random fashion, depending on when each star condensed from the interstellar cloud.
D) the more massive stars on the main sequence and the less massive stars above the main sequence.