Answer:
The sentence that shows pronoun and antecedent agreement is A. The school board is planning its programs for big merged schools where the teachers and principals are responsible for curriculum development.
Step-by-step explanation:
A pronoun is a word used to stand for a noun. Whenever a pronoun its introduced, it must agree in number -singular or plural form- to its antecedent, that is the noun its making reference to. In the case of sentence A, the pronoun its agrees with its antecedent the school board. Therefore, sentence A is the correct answer.