Which is the best assessment of this sentence from the speech? even if the world decided tomorrow to ban these weapons, this terrible legacy of mines already in the earth would continue to plague the poor nations of the globe. a)this line is justified because many poor nations lack sufficient money to trace and dispose of existing mines. b)this line is unjustified because if the production of mines is restricted, the governments of the poor nations can focus on disposing of the existing mines. c)this line is justified because mines are more of a threat to the poor nations than any weapon system. d)this line is unjustified because existing mines will become ineffective after some time and will not pose a significant threat.