If you were a waitress or a waiter, which of the following would you probably say often? quiero ¿algo más? prefiero la cuenta, por favor.

If you were  a waiter or a waitress you would probably say: "¿Quiere algo más?

The correct answer is:

Explanation:

If you were a waitress or a waiter you usually ask if the costumer wants something else.

In spanish, if you ask the costumer wants something else. That should be in a formal way.

The question in spanish is:

¿Quiere (do you) algo más (something else)?

well, if he says unos it is 1, if he says dos, it is 2, if he says tres, it is 3, if he says cuatro, it is 4

which dialogs ? ?