A good change control process will include:

a. all of these

b. a way to formally document change rejection

c. a way to find out the current status of a change under consideration

d. a way to formally document change approval

A. All of these

Explanation: Change Control is the process companies uses to document, identify and authorize changes to an environment or process. It assists in reducing the chances of unauthorized modifications, disruptions and errors in the system/process and therefore follows a specific pattern towards its implementation. This would include: Change request identification, assessment, analysis, approval or rejection, and finally implementation. All these from start to finish is usually documented in the change request log.

answer; vertical marketing system;