Detailed Instructions: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Q: The group members enjoy themselves in the tubes are the go downhill. They share some pictures of their tubing adventure. the snowy mountain slopes <sep> (A) , landscapes and their onlookers. (B) climb into sight and a group comes together on the slope. (C) have several other tubers enjoying themselves as they go down the slopes. (D) and waterfall is shown.
A:
C