Fredrick Who Works for a Telecom Company,is Building a Customer

Multiple Choice

Fredrick who works for a telecom company,is building a customer feedback system.In the system,there is one class which represents customers,another which represents customer service representatives,and a third class that represents technical support executives.Objects from each of these classes interact with each other in order to resolve problems and queries.Which of the following enables this interaction?

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