Answer:
The correct answers are:
Una tarjeta internacional, la clave de área, un teléfono celular, la guía telefónica.
Explanation:
To make an international call you will need at least one of these elements.
In case your call is from a landline, you will need an international card and the area code of the person who will receive the call. If you don't know the phone number, you may also need a phone book.
In the case that you use a cell phone, there are services such as roaming that facilitate this type of operation.
