* Buongiorno a voi! (Good morning to you!) - This is a simple and polite response.
* Buongiorno amici! (Good morning friends!) - A slightly less formal, but still perfectly acceptable, option.
* Buongiorno a tutti! (Good morning everyone!) - If there are more people than just your close friends present.
* Ciao a tutti! (Hi everyone!) - A more informal greeting, suitable for close friends.
* Buongiorno! Come state? (Good morning! How are you?) - This adds a personal touch and invites further conversation.
Choose the option that best fits the situation and your relationship with the people you're speaking to.