It Is Unlikely That Intelligent Life Would Develop on a Planet

Multiple Choice

It is unlikely that intelligent life would develop on a planet circling a star of significantly less mass than the Sun because:

A) no Moon would form around a planet near such a star, and a Moon is considered to have been essential for the evolution of life because of tidal variations on Earth.
B) the lifetime of such a star on the main sequence is too short; life-forms on such a planet would not have time to evolve intelligence.
C) the planet would probably become tidally locked to the star, making one side of the planet too hot and the other side too cold.
D) there would be no region around the star where UV, visible, and IR light intensities would be suitable for the evolution of life.