Final answer:
An indicator of severe abdominal trauma after an MVC may include unexplained shock.
Step-by-step explanation:
An indicator of severe abdominal trauma after an MVC may include unexplained shock. Shock is a serious condition where there is insufficient blood flow to the organs, often caused by significant blood loss or dehydration. It can occur as a result of severe abdominal trauma, such as internal bleeding, and is considered a medical emergency.