Final answer:
It is professional to answer the phone by the third ring in a business setting, as this shows respect for the caller's time and eagerness to assist.
Step-by-step explanation:
In a business setting, it is best to stay close to the phone and to answer it by the third ring. Answering the phone promptly is considered professional and helps maintain effective communication with clients, colleagues, and business partners. Not only does this demonstrate good telephone etiquette, but it also shows that the business values the caller's time and is eager to assist.