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listEn to A pArt oF A lECturE From thE sports stuDiEs DEpArtmEnt.

why DoEs thE proFEssor sAy this
A．to ExprEss unCErtAinty ABout his stAtEmEnts.
B．to inDiCAtE thE importAnCE oF his opinion.
C．to ChECk out whEthEr thE stuDEnts AgrEE.
D．to EmphAsizE his intErEst in sports physiology.