Write the next sentence in the following story.

Men are on the ocean doing windsurfing. A lot of men are on olympics doing windsurf on ocean. people

Available choices:
[I] is windsurfing in a competition on the sea.
[II] are sitting on big the beach drying their wet.
[III] is on an apron doing windsurfing.
[IV] are windsurfing in an open court in the beach with heavy surf waves.. The answer should be
[I]