Final answer:
When a call routes to an open red target or a red choose in a Dial Plan, it is terminated and an error message is played, indicating a misconfiguration or error in the dial plan.
Step-by-step explanation:
If a call routes to an open red target or a red choose in a Dial Plan, the answer is C) The call will be terminated and an error message will be played. This occurs because a red target or a red choose often indicates an error or misconfiguration in the Dial Plan, leading to a dead-end for the call. Rather than being routed to a voicemail, an agent, or being placed on hold, the call is terminated to prevent further confusion or system issues.