Processes in data flow diagrams are often coded. Which of the following statements concerning coding is incorrect?

A) Processes coded 4.11, 4.12, 4.13, and 4.14 are the subprocesses of a process coded 4.10.

B) Coding allows processes to be easily identified with the processes from which they are exploded.

C) The process in a context diagram is usually coded O.O.

D) Processes coded 2.1, 2.2, and 2.3 are the subprocesses of a process coded 2.0.

E) All of the above statements are correct.