余额对账单对外签发需加盖（）。

A.业务讫章

B.财务专用章

C.社（行）名业务公章

D.票据交换专用章

Which of the following most logically completes the argument
Each year a consumer agency ranks all domestic airlines for on-time performance during the previous year, using as its sole criterion the percentage of each airline’s flights that left no more than fifteen minutes late. The agency does not count delays due to mechanical reasons, but the fact that the percentage of delayed flights hat were delayed for mechanical reasons was approximately the same for all domestic airlines last year means that______.

A．including delays for mechanical reasons in calculating the airline rankings for on-time performance would have had little, if any, effect on last year’s rankings

B．airlines would work harder to reduce delays if delays for mechanical reasons were included in the determination of on-time performance rankings

C．the agency’s rankings do not give consumers an accurate idea of how a given airline compares to other airlines with respect to the percentage of flights delayed last year

D．those airlines with the best on-time performance record last year also had the greatest number of delays for mechanical reasons

E．(E) on-time performance was approximately the same for all domestic airlines last year