The Spiral Galaxy in Which We Live Is Roughly 14

The spiral galaxy in which we live is roughly 14 billion years old.Which statement about the stars that formed when our Galaxy was very young (say,during the first billion years) is TRUE? (See Table 11-2,Comins,Discovering the Essential Universe,6th ed.)

A) No stars are still on the main sequence-in this time all stars have finished their lives.
B) All stars of less than 3/4 of the mass of the Sun are still on the main sequence.
C) All stars of more than 15 times the mass of the Sun are still on the main sequence.
D) All stars of 3 times the mass of the Sun are still on the main sequence.