According to the option provided the answer would be "¡ Ella está guapa en su traje de novia!" This would mean that she is pretty in her wedding dress.
if we pay attention to the verb form, it might be said that it agrees in gender and number with the subject pronoun "ella". It is 3rd person singular and feminine. <span />
Answer:
la
clase
de
ingles
me
interesa
Hope it helps and have a great day! =) I'v known Spanish my whole so this should be correct.