Answer:
The correct word that fills the blank is:
- Someone from los Estados Unidos is called estadounidense.
Step-by-step explanation:
Though in the US is common mentioning the people how American, in Latin America, is badly seen mentioning the people of a country how the people of all the continent, by this reason, How United States of America is in Spanish "Estados Unidos de América" the correct demonym of a resident from the US is "estadounidense".