A、sChool Bus hAs 10 DouBlE sEAts in EACh oF2 rows．two stuDEnts CAn sit in EACh DouBlE sEAt．iF An Empty Bus stArts out AnD mAkEs two stops，piCking up thrEE timEs thE numBEr oF stuDEnts At thE sEConD stop As At thE First stop，AnD iF thE Bus is thEn FillED to sEAting CApACity，how mAny stuDEnts got on thE Bus At thE sEConD stop
A、5 B、10
C、15
D、20
E、30