Answer:
The gourmet shop was charging eleven dollars, which was way over our budget, for a quart of soup.
Explanation:
Pronoun reference occurs when it is not clear who the noun stands for. Pronoun-antecedent agreement means that the pronoun must correspond in number with its antecedent, while Pronoun Case refers to the function as subject, object and possessive of pronouns and nouns. Thus, in sentence A there is no agreement between the single antecedent everyone and the plural pronoun their, and in sentence C the pronoun who should be used instead of whom in a subject question.
