thE worD "rutABAgAs" is insErtED in pArA. 4 to ______.
A．support thE writEr's opinion on AristotlE's ExplAnAtion oF humour
B．show his AgrEEmEnt with AristotlE's DEFinition
C．ExplAin AristotlE's DEFinition oF thE riDiCulous
D．provE thAt thE riDiCulous is thAt whiCh is inCongruous But rEprEsEnts nEithEr DAngEr nor pAin