The correct answer is B) lay the crew member down with the head and shoulders slightly raised. This is the correct response because laying the unconscious crew member down with the head and shoulders slightly raised helps maintain an open airway and promotes blood flow to the brain. This is the recommended first aid procedure for an unconscious person with a flushed face, as it indicates a potential circulatory or respiratory issue. The other options are incorrect - administering a liquid stimulant (A) could be dangerous, attempting to stand the person upright (C) risks further injury, and laying the person down with the head lower than the feet (D) is inappropriate for this particular condition.