—Did you tell your headmaster that the teachers and students had a number of ________ their lunch?

—Yes. He said he must solve this problem.

A. complains about   

B. complaints of   

C. complaints about

D complaints of 

非参统计与参数统计相比较，优点是（）。

A.统计效率高

B.容易计算

C.适用范围广，不限于资料的分布

D.结果更可靠

E.以上都是