Well I guess B is the correct answer in Mediterranean diet you should consume healthy foods like: olive oil, fruits, vegetables and cereals instead of red meat, sugar, fat and other unhealthy foods hope this helps
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
Because, gustaban ends in a -an, which means that it applies to the they/y'all because the subject is "your parents", being plural. And -an means that what it is talking about is plural.