What letter(s) does the letter "z" change to at the end of a plural noun?

Question

For example: la nariz--> las nari___

(2 points)
Responses

The letter "z" changes to "s."
The letter "z" changes to "s."

The letter "z" changes to "ces."
The letter "z" changes to "ces."

The letter "z" changes to "ies."
The letter "z" changes to "ies."

The letter "z" does not change in the plural.

Answer 1

The correct answer is: The letter "z" changes to "ces."

So the complete example is: la nariz → las narices.