A、upgraded in reliability and safety. B、reduced in size and number. C、dismantled partly later this year. D、maintained in their p

France and the US have signed an accord to share sensitive information on nuclear weapons. US and French officials say the agreement is aimed at maintaining the reliability and safety of the two countries’ nuclear stockpiles. As part of the accord, the US will share with France its computer data on simulated nuclear explosions. Until now, the US data were shared only with Britain. Officials say the agreement will help the two countries maintain their arsenals after they sign a global treaty expected later this year that bans all nuclear testing.