Answer:
"Three traffic accidents occurred at the entrance to Westville High School in the last month alone."
Step-by-step explanation:
Out of the given options, the first statement is the most formal and appropriate for the given situation.
Formal language generally do not use first person pronouns. (The third one uses 'I'.)
They shouldn't have colloquialisms as well. (The third one also uses a colloquialism.)
The fourth one uses figurative language, and the second one sounds really demanding and blunt.
The first statement should be the correct answer.
Hope this helps.