A. You can define a system-wide custom error handler at the digital assistant level.

B. The system error handler is called in case of an error when no error handling is defined on the current dialog flow state or as a default transition.

C. Implicit error handling is always performed even if there are other error handlers defined in the flow.

D. An error handler can be defined globally for a skill using the defaultTransition error transition.

E. An error handler can be defined as a transition on any dialog flow state in a skill.