AtCollEgEC、thErE ArE From 2 to 4 introDuCtory philosophy ClAssEs EACh sEmEstEr，AnD EACh 0F thEsE ClAssEs hAs From 20 to 30stuDEnts EnrollE
D、iF onE sEmEstEr 10 pErCEnt oF thE stuDEnts EnrollED in introDuCtory philosophy FAilED，whAt is thE grEAtEst possiBlE numBEr who FAilED
A、12 B、10 C、8
D、6 E、3