下图是20世纪60年代在东西柏林边界上修筑的“柏林墙”，它是东德人和西德人难以逾越的障碍；20世纪末，德国统一，柏林墙拆除。柏林墙的修建，反映了哪一历史状况

A、美苏冷战

B、欧洲一体化

C、世界多极化

His son’s excellent work      his rise in the company, while her daughter’s laziness     her failure

A．led in; resulted from

B．led to; resulted in

C．led in; resulted to

D．led for; resulted from