It would be "Diana prefiere que nosotros tragamos la comida para las vacaciones" because you have to conjugate the verb "tragar" for Nosotros, so you would replace the "-AR" ending with "Amos".
Sophie necesita agua porque tiene sed.
Explanation:
Decide if the reflexive verb is conjugated correctly in the following sentence.
Es necesario cepillarse los dientes. (cepillarse)
Answer: The reflexive verb IS conjugated correctly.
Choose the best answer to complete the sentence.
Necesito _______ el programa en mi computadora
Answer: Reiniciar