A. You can use the user input component's textReceived action transition to detect validation errors and to navigate to a state in the dialog flow.

B. You can use the system. invaliduserinput?booiean expression to detect a previously failed input validation and display alternative prompts or additional UI controls.

C. You can use the alternatePrompt property for user input components to display alternative prompts.

D. You can use the user input component's cancel action transition to navigate to a different state in the dialog flow, display a help message to the user, and navigate back into the dialog flow state that previously failed input validation.

E. You can use the onlnvaliduserlnput property on the System.commonResponse component to conditionally show or hide UI controls.