No stars have been found with masses greater than 300 times our Sun because A. they shine exclusively at X-ray wavelengths and become difficult to detect. B. they would fragment into binary stars because of their rapid rotation. C. they are not bright enough to be seen nearby. D. they would generate so much power that they would blow themselves apart. E. molecular clouds do not have enough material to form such massive stars.

D)they would generate so much power that they would blow themselves apart.

Explanation:

Stars contains helium and hydrogen gases with helium forming a large percentage. When a star is a few times greater than the Sun it could cause it to collapse into a black hole.

However when the mass of the star is 200 times greater than the sun, it means a larger percentage of helium gas which is formed by the fusion of hydrogen nuclei with a large amount of energy being the by product of this fusion process. This would make the Stars generate so much power that they would blow themselves apart.