Tidal forces are very important to the Algol system today, but were not important when both stars were still on the main sequence. Why not?
a.Main sequence stars are too massive to be affected by tidal forces.
b.Main sequence stars are unaffected by tidally-induced mass transfer.
c.Main sequence stars in a system like the Algol system are small compared to their physical separation.
d.Main sequence stars are too big to be affected by tidal forces.
