Please help me due in 19 min

Read and select the correct sentence. va al casa. va a el casa. va a la casa. va en casa.

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.

Which pair of features is relevant when buying a pc? a. memoria ram y servicio de mensajes escritos b. tiempo de duración del contrato y memoria del disco duro c. memoria ram y precio d. ancho de banda y memoria ram