题目内容：
根据以下材料，回答题Doyouknowhowtoplayagamecalled"MusicalChairs"?Itiseasytoplayandmostpeopleenjoyit.Allyouneedaresomechairs,somepeopleandsomewayofmakingmusic.Youmayuseapiano
oranyothermusicalinstrument,ifsomeonecanplayit.Youmayuseataperecorder.Youcanevenusearadio.
Putthechairsinarow.Thechairsmaybeputintwos,backtoback.Abetterwayistohavethechairsinonerowwitheachchairfacingintheoppositedirectiontothechairnexttoit.
Thegameiseasy.Whenthemusicstarts,theplayerswalkroundthechairs.Everyonegoesinthesamedirection,ofcourse,theyshouldwalkintimetothemusic.Ifthemusicisfasttheyshouldwalk
quickly.Ifthemusicisslow,theyshouldwalkslowly.
Thepersonplayingmusiccannotseethepeopleinthegame.Whenthemusicstops,theplayerstrytositonthechairs.Ifapersoncannotfindachairtositon,hedropsout.Then,beforethemusic
startsagain,onechairmustbetakenaway.Whenthemusicstopsagain,onemoreplayerwillbeout.
Atlast,therewillbetwoplayersandonechair.Theonewhositsonthechairwhenthemusicstopsisthewinner.
Iftenpeopleareplayingmusicalchairs,youmustbeginwith__________. A．ninechairs
B．tenchairs
C．elevenchairs
D．onechair
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