The answer is C. Thesaurus
Answer:
the smile suggest that the womans age makes her beautiful because it fades as the opera tune fades slowly
Nominative case pronoun would be a pronoun in its basic form, so: I, you, he, she, it, we, you, they...
So, the correct answer is A, 'I' is a nominative case pronoun, whereas the other examples only have objective case pronouns: them, him, her.