《国家电网公司供电服务规范》第十一条规定：客户在营业窗口办理用电业务的等候时间不超过20分钟，交费时间不超过（）分钟。

A.30

B.20

C.3

D.5

The efficient market hypothesis implies that fundamental analysis:（）

A. is inferior to technical analysis because fundamental analysis is not timely. 

B. requires the analysis to predict movements in relevant variables that affect rates of return. 

C. will be successful if transaction costs are minimized by focusing on a limited number of large-capitalization stock