We are reading a book that contains an account of early space flights. Which kind of pronoun is that in the sentence? relative indefinite interrogative demonstrative

I believe the correct answer would be indefinite.

Demonstrative pronouns take the place of longer phrases.

Relative pronouns are used to connect phrases to a noun or pronoun. Some examples are who, whom, and which.

Interrogative pronouns are used to ask a question. Examples include who, when, and where.

Indefinite pronouns are pronouns that are vague and do not refer to a specific person or group.

"We" in this case is vague. We don't know who "we" is. Therefore, I think it would be classified as an indefinite pronoun.