The Process of Evolution of Stars in the Universe Has

The process of evolution of stars in the universe has been interpreted by

A) matching theoretical models to the properties of similar stars at different distances from Earth, since more distant stars from an earlier time are observed, when the light left them.
B) matching theoretical models to the collective properties, such as luminosity, temperature, and size, of millions of stars as observed.
C) designing theoretical models solely on the basis of the known properties of matter, without reference to observational data on real stars, since there is not have a sufficiently long time base for stellar observations.
D) matching theoretical models to the detailed observation of a few stars as astronomers watch them change in luminosity, temperature, and size during their evolution.