Tu is used when you referring to someone you already know, someone in an informal or even fellow classmate, so it's false but you are supposed to greet someone by using "usted".
The answer is A. Sirven.
<h2>THE WAITRESS AND THE WAITER SERVE THE WATER.</h2>
Camine
beba
comer
compartir
hable
diga
hacer
ponga
salga
escuche
1. Haga la lectura
2. Mira a Mi
3. Cante la melodic
4. Llame a nosotros