Given the question: Some time ago, a friend working in a part of the city I did not know very well, invited me to visit him. It took me hours to get there and I drove round and round looking for a place to park my car. At last I found a place in a back street. As I was already half an hour late, I parked my car quickly and hurried off on foot. Making my way rapidly along the street, I could not help thinking that it was much easier to walk than to drive. At noon, I left my friend's office. It suddenly stuck me that I had no idea where I had parked my car. Walking down street after street, I examined each car closely and was greatly relaxed to see a small green car just behind an old truck. But how _ I was to discover that though the car was very much like my own, it belonged to someone else. Quite tired now, I was ready to give up the search when I turned the corner. I nearly jumped with joy: my car was just in front of me ! When he left his friend's office, what happened to him? A) He wanted to go back. B) He didn't know where he had parked his car. C) He had a telephone call. D) He found his car.
The answer is:
B