Multi-choice problem: Continue writing the next sentence in this paragraph:

There are several people getting ready to ski. there

Choices: (A). 's a person skiing downhill with full speed whose shadow can be seen. (B). are several tubes lined up in a lined pathway going down a hill. (C). is a man sitting at a piano and playing the piano for the very first time. (D). are numerous inches of snow on the ground and they're playing snowboard.
(A).