Explanation
The correct answer is option 4 (remain calm, isolate the accident scene, and keep onlookers away). This question assesses First aid; this alternative directly meets the conditions in the prompt and the road-safety rules. The other alternatives broaden, narrow, or depart from the stated conditions and therefore should not be selected. Under the current rule, the difficulty is 3 on a scale from 1 to 5.
Source
Reference not provided yet.