thE DisputE BEtwEEn north korEA AnD thE unitED stAtEs is mAinly on ______
A．thE us's AtomiC AttACk AgAinst north korEA
B．north korEA's plAn to DEvElop A nuClEAr projECt
C．thE worlDwiDE proliFErAtion oF nuClEAr wEApons
D．irAqi possiBlE proliFErAtion oF nuClEAr wEApons