Answer:
a. Parking in the street overnight tonight may get Peter fined.
Explanation:
Peter left the car parked overnight and was warned that this is wrong and is not allowed. Probably Peter left the parade parked overnight again and for that reason he got the ticket. As it is said in the text, the driver only escapes the fine when irregular parking happens for the first time. For this reason, the correct answer to your question is the letter A.