The correct answer is a. A-iii, B-ii, C-i.
Romeo: is compared to "a snowy dove" (iii).
Juliet: is compared to "new snow on a raven's back" (ii).
Juliet's fellow dancers: are compared to "crows" (i).
Explanation: This comparison highlights Romeo's purity and beauty like a snowy dove, while contrasting Juliet's exceptional beauty against the darkness, like new snow on a raven's back.