Which of the Following Is a True Statement Regarding Sources/sinks

Multiple Choice

Which of the following is a true statement regarding sources/sinks?

A) Data must originate outside a system from one or more sources.
B) The system must produce information to one or more sinks.
C) Sources/sinks are always outside the information system and define the boundaries of the system.
D) If any processing takes place inside the source/sink, we are not interested in it.
E) All of the above are true statements.