Answer:
A.Mass
Explanation:
The color of most stars is determined by their surface temperature, which is determined primarily by their mass, and secondarily by their age. This answer pertains to the so-called “main-sequence dwarf” stars. The “giant,” “super-giant” and “white dwarf” classes of “evolved” stars, which are approaching the end of their lives, exhibit temperatures (and colors) that are related to their masses, but not in a simple way.
The color of light that we perceive is related to its frequency.[1] The little rainbow graph and table below shows this relationship for monochromatic or bandwidth-filtered light.
