Answer : estas
the plural form of esta or es, meaning it is.
the Iguaza Falls, The Train of Clouds and THe plaza 9 de Julio, Una empanada cortada a cuchillo and El Futbol
La Boca is in Buenos Aires just to say
*I Would have too say it might be B!*
“trabaja”, “es”, “(se) llama”, “Vive”, “Tiene”, (“Trabaja”)