Answer: Emailing
Step-by-step explanation:
Emailing is one of the most efficient way for communication in the business. Email is one of the formal type of communication in which we can communicate others in an organization.
By using the email system we can send various types of business related documents, pictures and files. Emailing is known as the fastest way of communication in an organization as it increases the efficiency and also productivity of the specific business.
Therefore, Emailing is the correct option.