You Are Observing a Binary System with Two Stars of Masses

Multiple Choice

You are observing a binary system with two stars of masses M₁ and M₂.You determine a,the semimajor axis (also the average distance between the stars) and P,the period of their motion.Using this information in Kepler's third law,you can calculate:

A) M₁ or M₂ but not both.
B) M₁/M₂.
C) M₁ + M₂.
D) both M₁ and M₂.