Sabrina and I were excited for the opening of the new bakery.
The doughnuts we bought were the best us had ever tasted!
The antecedent in this sentence does not match the underlined pronoun in case. Option A is correct.
Case refers to a special grammatical category of a noun, pronoun, adjective, participle or numeral which value reflects the grammatical function that the word has in a sentence in a phrase, clause or sentence.