For this case we want to translate the following word:
"You"
The first thing you should know is that this word has two different meanings in Spanish.
The first meaning is:
you = usted
The second meaning is:
you = tú
The first meaning is different from the second, since it is used in more formal situations such as a job interview.
Answer:
The correct translation: you (formal) is:
a. usted
