thE mAin iDEA oF thE nEws is ______.
A．north korEA AgrEED to holD pEACE tAlks with south korEA
B．north korEA violAtED thE nuClEAr non-proliFErAtion trEAty
C．north korEA signED An AgrEEmEnt to ABAnDon its nuClEAr wEApons
D．north korEA ABAnDonED its usE oF nuClEAr powEr