Answer:
d) eres
Step-by-step explanation:
Tu eres de los Estados Unidos translates
You are from the United States
soy is wrong because it'd be You I am from the United States
es is wrong because it'd be You is from the United States
son is wrong because it'd be You are (plural) from the United States
Although son could work if you base it off the translation, it is grammatically wrong in spanish