In a Fairly Young Star Cluster, If the Most Massive

In a fairly young star cluster, if the most massive stars are swelling up into giants, the leastmassive stars are:

A) also evolving off the main sequence as well.
B) continuing to shine as stable main sequence stars.
C) blowing off shells as planetary nebula instead.
D) collapsing directly to white dwarfs.
E) still evolving toward their ZAMS positions.