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".
Answer:
the pronouncement of the letters are different in Spanish w×wwwwydhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdb dhdbd d d d d d d d d d d d d