听力原文： At a conference in Vienna, Friday, 89 nations agreed to restrictions on atomic d

evices, aiming to reduce the threat from nuclear terrorism. The delegates adopted a draft amendment from China tightening aspects of the 1980 Convention on the Physical Protection of Nuclear Material. The amended convention will make it "legally binding" for states to protect all nuclear facilities and materials in use, storage or transport. The previous convention only dealt with fissile materials while in transport. The treaty also provides for expanded international cooperation to prevent nuclear theft.

The 1980 convention on the Physical Protection of Nuclear Material ________.

A．made it "legally binding" for states to protect all nuclear facilities and materials

B．dealt with the protection of nuclear facilities and materials not only in transport but also in use and storage

C．also provided for expanded international cooperation to prevent nuclear theft.

D．only dealt with fissile materials while in transport.