Which of the following does not follow the sequence of the mediator pattern?
(a) As in any broker pattern, the Mediator receives a request for service at last
(b) It then controls an interaction with the collaborating colleagues to supply the service
(c) If one collaborator needs help from another, it notifies the Mediator object, which obtains the needed service from another collaborator
(d) None of the mentioned
The question was asked in a national level competition.
Enquiry is from The Facade and Mediator Patterns in division Visibility, Accessibility and Information Hiding of Software Architecture