A、group of topChinese scientists will ______.
A. visit the U. S. and WesternEurope to improve the ties betweenChina and them
B．come closer to the U. S. and WesternEurope
C．close the door ofChina to the U. S. and WesternEurope
D．improve the ties between the U. S. and WesternEurope