Which of the Changes A-D Will Always Increase the Internal

Multiple Choice

Which of the changes A-D will always increase the internal energy of a system?

A) The system gains energy and performs work.
B) The system gains energy and work is performed on it.
C) The system loses energy and performs work.
D) The system loses energy and work is performed on it.
E) None of the changes A-D will always increase the internal energy of a system.