Please help, will mark brainiest

When could you attach the direct object pronoun to an infinitive verb? a: when an infinitive verb follows a conjugated verb. b: when an infinitive verb ends in a question. c: when a stem-changing verb ends in a question. d: when a stem-changing verb follows a conjugated verb.

Select the word from the list that best fits the definition tu madre espera que tú en casa a las ocho. hable hagan sepa estès escribamos

Ineed with 6-! i don’t understand it