I take 23-3The pronoun cannot refer to a possessive noun functioning as a modifie

they could refer to the parents , so the sentence is ambiguous.

a possessive noun functioning as an adjective,  the meaning of the sentence is ambiguous because it could refer to.The pronoun cannot refer to a possessive noun functioning as an adjective, in this case.It is more polite to use the object of the verb. The verb should be in the objective. The pronoun that makes sense with the understood verb. The pronoun that makes sense with the understood. When deciding whether to use we or us before a noun, choose the pronoun that would be appropriate if the noun were omitted.