In an Interface, What Is the Role of a Command

Multiple Choice

In an interface, what is the role of a command control in supporting users' work flow control?

A) It lets users locate required system action by selecting from predefined options;
B) It activate a particular system action;
C) It helps users control system actions by allowing users to specify their intentions through questions and answers;
D) It ensures that users intended controls are correctly implemented;
E) It confirms users' specific inputs.