A. Separating production and test versions of programs will not permit unrestricted access to programs.

B. Separating libraries for production programs and for test versions of programs would require a specific policy or procedure. Thus, separating these functions may in fact decrease efficiency of system development.

C. Separating production and test versions of programs will not facilitate user input on proposed changes.

D. Separating production and test versions of programs is the means of restricting access to production programs to individual users. Thus, the effect is a separation of incompatible duties, such as programmers and operators.