Last weekend, I and my classmates went to the countryside to have a picnic. Before leaving, we made some sandwiches for lunch. We left quite early to avoid the traffic jam.After driving for two hours, we arrived at a very nice place. It was near a river with some big trees around it. The driver parked the car under the tree. Seeing the clear and cool water of the river, my friends and I decided to swim. After having lunch together, we went around the area to enjoy the scenery. We saw some beautiful birds and butterflies.

After walking about an hour, we decided to return to the car and go home. Unfortunately, we could not start up the car. Finally after sometime, we could make the car start up, by pushing it. We were happy although we felt a bit tired when we got home.

22. "it was near a river with some big trees around it" (paragraph 2) The underlined word refers to

A. a river B. the car

C. the butterflies

D. the sandwiches​​