Which of the Following Is True of an Open System

Which of the following is true of an open system?

A) It is more likely to experience entropy than is a closed system.
B) It uses resources from the external environment for internal processes, but does not return anything to the external environment.
C) The input, process, and output stages in the production process are performed in the external environment.
D) It is a self-contained system that is not affected by changes in its environment.
E) It takes in resources from its external environment and converts them into goods that are then sent back to that environment for purchase by customers.