You see your Spanish teacher at the grocery store. How do you ask how is she doing? A. ¿Qué tal?

B. ¿Cómo estás tú?

C. ¿Cómo eres?

D. ¿Cómo está usted?

It should be D.

Explanation:

-It cannot be the number "A" because "A" means "How it´s going", that doesn´t mean "How is she doing".

-It cannot be the number "C" because "C" means "As you are", that doesn´t mean "How she doing".

-But there is a problem, it can be "B" and "D" because "B" is an informal way to say "How are you" and is used a lot between conversations and meetings, and "D" is a formal way and a respectful way to talk to someone, to say "How are you" but is not so common between conservations.

-Hope this helps.

i dont know about that