The Method of Stellar Parallax

The method of stellar parallax:

A) can be used to measure the distance to stars in distant galaxies, just as it can be used for stars in the Milky Way Galaxy.
B) can be used for distant galaxies, but only when used with giant molecular clouds (which can be seen at such distances) , not with stars.
C) cannot be used for distant galaxies because redshift spectra are inherently imprecise at such distances.
D) cannot be used for distant galaxies because of the difficulty of resolving the spectra individual stars.