La familia anfitriona de charlie y sophie es una familia que no viaja fuera de buenos aires

TRANSLATION:

Charlie and Sophie's host family is a family that doesn't travel outside of Buenos Aires

verbal tense: present indicative.

Explanation:

The present indicative in Spanish is used to place an action at the time of speech or in the very near future, to describe a routine or actions that are repeated, or to refer to stable or permanent situations.

The present in Spanish is used to express:

Permanent facts and conditions;

Example: este ES Manolo.

Routines;

Example: Todos los jueves él JUEGA fútbol.

The time that an action has been happening;

Example: JUEGA fútbol hace cinco años.

Future actions accompanied by a temporary expression;

Example: El próximo domingo tu equipo PARTICIPA en un torneo de liga.

the answer is c. estudió

explanation:

to translate: last year a group from my school went to cuba and studied the history of the island. you would use preterite form because it was one time and they use fue in the sentence.