Answer:
The correct answer is nos despedimos.
Step-by-step explanation:
We use the present simple to talk about actions that are a routine or something habitual, in this case it is saying goodbye every morning.
The case of reflexive pronouns are those that are used when the subject does the action for himself.
Depending on each person, the following reflexive pronouns will be used:
yo me
tú te
él, ella, usted se
nosotros/-as nos
vosotros/-as os
ellos/-as se
Given this information we can say that the correct answer is nos despedimos.