Which of the Following Statements About Usability of a System

Multiple Choice

Which of the following statements about usability of a system is correct?

A) Any system that is usable to perform the designed functionality has good usability;
B) The usability of a system cannot be examined without considering a specified use context;
C) The usability of a system has nothing to do with the tasks performed by users;
D) The usability of a system is a subjective concept that completely depends on users' impression with the system;
E) A system's usability does not rely on what the system is used for.