Ethan,who Works in the IT Department of a Travel Company,is

Multiple Choice

Ethan,who works in the IT department of a travel company,is developing a software system to track their work processes.In the system,he creates processes such as Book Air Tickets,Make Hotel Reservations,Schedule Meeting With Travel Executive,and so forth.Which of the following object-oriented concepts is Ethan using?

A) Classes
B) Information
C) Procedures
D) Messages