—________, and so did I.
A:So she had
B:So had she
C:So she did
D:So did she
读香港和澳门图,回答:
据史书记载,西周初年有800个诸侯国,春秋初年还剩170多个,战国初期还有十几个诸侯国,到公元前221年,实现了“四海一”。这一历史现象反映了我国历史发展的什么趋势?