Answer: A : Colombia
Explanation: Here is the text and translated version to explain.
Hola chicos, mi nombre es Alberto.Hace 10 años que visité a la familia de mi padre en Colombia, yo los voy a visitar este mes, el año que viene, yo quiero visitar a mi abuela en España.
Hi guys, my name is Alberto. 10 years ago I visited my father's family in Colombia, I'm going to visit them this month, next year, I want to visit my grandmother in Spain.
Alberto is going to colombia this month, which is first, THEN he will visit his grandmother in spain. So A : Colombia is the only right answer.