What prevents stars greater than about 100 times the Sun's mass from existing?
A) The rate of thermal expansion would overcome gravitational attraction leading to explosion.
B) The gravitational attraction would overcome the rate of thermal expansion leading to a black hole.
C) Fusion cannot take place at these higher mass levels.
D) The gaseous material of the universe is too widely dispersed to allow for the formation of stars of this mass.
Answer: A
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