Question

i am (estar)
yo estoy vosotros sois
estar usted es

Explanation:

The question is about conjugating the Spanish verb "estar" for the first - person singular ("I"). In Spanish, the first - person singular conjugation of "estar" is "yo estoy". Let's analyze the other options: "Vosotros sois" is the second - person plural (you all, informal in Spain) conjugation of "ser" (not "estar") and is incorrect here. "estar" is the infinitive form, not a conjugated form for "I". "Usted es" is the conjugation of "ser" for "you (formal)", not related to "estar" for "I".

Answer:

A. Yo estoy