Write the next sentence in the following story.

People are seen riding on a tube down a river. the people

Choose your answer from:
[a]. ride down while being pulled by a person on a cable..
[b]. turn on their tubes, then go down the hills..
[c]. hold their hands up and smile while still riding down..
[d]. keep riding down the river as bubbles come up from below... The answer should be
[c].