thE Author's purposE in writing this pAssAgE is______.
A．to DEsCriBE thE DiFFiCultiEs in solving humAnity's CurrEnt proBlEms
B．to prEsEnt thE DiFFErEnt viEws on humAnity's CurrEnt proBlEms
C．to AnAlyzE thE ContrADiCtion BEtwEEn CountriEs in DEAling with humAnity's CurrEnt proBlEms
D．to point out thAt humAnity's CurrEnt proBlEms CAn only BE solvED through thE CoopErAtion oF nAtions