Answer:
The question is incomplete and considering that the one of the statement of the question is "The client is in shock because the blood volume has decreased in the system" is the correct statement.
The emergency medical services main duty is to provide the medical emergency to the patients in the medical situation. The emergency situation might includes the accident, heart failure or fire in any place.
The patients that is injured in the accident might suffers from the shock. This shock occurs in the body as because of the low blood volume in the body. The low blood volume may leads to condition like low blood pressure and might the body filtration rate.