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 />
B. <span>Cuáles
</span>Cuáles" is for plural words whereas Cuál refers to singular objects/words. This essentially means that because of the usage of the word, "<span>frutas," which is plural, then B would be the correct answer.</span>