Regarding Program Modifications,which Statement Below Is Incorrect

Regarding program modifications,which statement below is incorrect?

A) Only material program changes should be thoroughly tested and documented.
B) When a program change is submitted for approval,a list of all required updates should be compiled and then approved by management and program users.
C) During the change process,the developmental version of the program must be kept separate from the production version.
D) After the amended program has received final approval,the change is implemented by replacing the production version with the developmental version.