Which one of the following constitutes the illegal use of material nonpublic information（）

A. Trading based on your analytical review of the firm’s future prospects.

B. Trading immediately after attending the firm’s annual shareholders’ meeting.

C. Trading on information your sister, the firm’s attorney, told you over dinner.

在影响教育的诸多因素中，制约教育发展规模和速度的根本因素是（）。

A.人口分布

B.生产关系

C.政治制度

D.生产力水平