Final answer:
Placing a customer on hold during a 911 call can have serious consequences, including delaying emergency response time and potentially endangering lives.
Step-by-step explanation:
If you place a customer on hold during a 911 call, it can have serious consequences. When someone calls 911, it means they are in an emergency situation and need immediate help. Putting them on hold can delay the response time of emergency services, which can be life-threatening in critical situations. It is crucial for emergency operators to stay on the line, gather information, and provide guidance until help arrives.