Una cláusula típicamente introducida por una conjunción que forms parte y depende de una cláusula principle
the answer will be "tú eres de Miami" because "eres" means are, so it will be like saying you are from Miami. To use "estás" makes no sense since it would be like saying you are Miami.
The correct answer is:
A. ¿Has tratado de bucear?
Have you (singular, informal) tried to snorkel?