{{i}}quEstions 14—16 ArE BAsED on thE Following tExt ABout ColD、you now hAvE 15 sEConDs to rEAD quEstions 14—16.{{/i}}

ACCorDing to thE pAssAgE, why hAvEn’t thE sCiEntists FinD A CurE For thE Common ColDA．thErE ArE too mAny kinDs oF ColD virusEs For thEm to iDEntiFy.
B．thErE is no CurE.
C．thEy ArE too Busy.
D．thE virus is too smAll.