Polarized Light Is to Have Its Polarization Plane Rotated by 90

Multiple Choice

Polarized light is to have its polarization plane rotated by 90 $\degree$ .In which of the following cases does the final beam have the greatest intensity?

A) 3 polarizing filters,each rotate beam by 30 $\degree$ .
B) 2 polarizing filters,both rotate beam by 45 $\degree$ .
C) 1 polarizing filter,rotating beam by 90 $\degree$ .
D) None of the above,polarized light can't be rotated.