—Why didn't Alice come to the party last night?

—I don't know ______. [ ]

A. why didn't she

B. why she didn't

C. why did she

D. why she did

56-57 为套题. 某合资寿险公司在中国经营十余载以来，价值低的产品基本不卖，保单内含价值很高，公司优秀的代理人鲜有被‘挖角’的，2006 总保费同比成长 27％。

上述情况表明，该公司为保证长期发展战略的实现，很注重在那个营销渠道培育核心竞争力？（）。

A．个险渠道

B．银保渠道

C．团险渠道

D．互联网电子商务