Company.com has crated a process application monitor for an application that is initiated by a "c"  Shell script. The application monitor is not functioning as designed.  What could be the issue with eh application monitor？（）  

• A、 A process monitor cannot monitor an application started by a shell.
• B、 For process monitors to function correctly， they must use the "korn" shell.
• C、 A custom monitor cannot de3termine the status of applications started by shell scripts.
• D、 The process monitor script is not existing with a zero return code after checking the status of the application.