Until yesterday, I did not like the trolley system in my town. I thought the trolley cars were too slow and cost too much money. I couldn't imagine why anyone would want to ride the trolley. Yesterday, I locked my keys inside my car. I wasn't able to call for help because I forgot my cell phone. I did not know what to do, and I started to panic.
"Can I give you a ride?" a kind voice called out over the sound of the noisy traffic. The voice belonged to the driver of a trolley car. His friendly attitude helped me calm down and enjoy the trip. By the time my ride was over, I was actually laughing! The next time I need a ride, I will head straight for the nearest trolley stop.

Which event changed the author's negative view of the trolley system?
A.
locking the keys in the car
B.
hearing the noisy traffic
C.
meeting the trolley driver
D.
forgetting his or her phone