Final answer:
In the context of pronoun-antecedent agreement, the sentence 'Mrs. Smith was excited to teach her class' shows the correct application as the pronoun 'her' agrees with its antecedent 'Mrs. Smith' in number and gender.
Step-by-step explanation:
In pronoun-antecedent agreement, a pronoun should agree in number (singular or plural) and gender (male, female, or neutral) with its antecedent (the noun it refers to in the sentence).
Examining the sentences given: 'A. The raindrops poured down, and it drenched the yard' and 'D. Mrs. Smith was excited to teach her class'.
Option A isn't correct because 'it' is singular and 'The raindrops' is plural. For Option D, 'Mrs. smith' and 'her' match in number and gender. Hence, 'D. Mrs. Smith was excited to teach her class' is the sentence with correct pronoun-antecedent agreement.
Learn more about pronoun-antecedent agreement