What is the correct possessive pronoun to fill in: "The teacher told me that the choice was _____."?

In the sentence "The teacher told me that the choice was _____," the correct possessive pronoun to fill the blank is "mine." The use of "mine" indicates that the speaker is expressing ownership or personal connection to the choice mentioned. It is a first-person possessive pronoun that corresponds to the speaker, emphasizing that the choice belongs to them.

The other options do not fit the context of the sentence in the same way. "His," "hers," and "theirs" are third-person possessive pronouns referring to ownership by another individual or group, not the speaker. Therefore, "mine" is the only option that accurately reflects the possessive relationship of the speaker to the choice being discussed.