The question says what are you (plural form) going to do after dinner? According to the question, the answer will refer to the pronoun we, nosotros in spanish, and the conjugation of the verb ir in present is nosotros vamos. So, the right answer is vamos a descansar después de la cena.
En colombia está el arroz con leche, postre de maracuya en argentina está el arequipe ,en cuba está la Natilla de vainilla, pastel de limón, en España está dulce de leche
