A. Preposition: over; object of the preposition: bridge
A preposition shows the location of an object, it shows where something is. In this case the preposition is "over" as that is the only word that is showing 'where' something is and thus the car becomes the object.
Answer: is there a specific block of text or just the entire story?
Explanation:
A narrator may be unreliable because he or she is biased and states their opinion instead of fact.
