Answer:
The Closing (A)
Step-by-step explanation:
The other parts are usually required in a formal e-mail:
the salutation - a polite form of address, usually "Dear [title] [last name]"
the contact information - includes the sender's name and email address
the person’s last name - used in the salutation
The closing, which is often a short phrase like "Best regards" or "Sincerely", is an optional part of a formal business email. Some people skip the closing and just include their full name and contact details at the end.