It was ____ exciting news that more than ten students in a single school were admitted to Tsinghua University in the same year.

A．one

B．an

C．/

D．a

《通典》记载：阳嘉元年，尚书令左雄改察举之制，侍中张衡上疏曰：自初举孝廉，到今二百年，必先孝行；行有馀力，乃草文法耳。今诏书一以能诵章句、结奏案为限，虽有至孝，不当其料，所谓损本而求末者也。文中“损本而求末”的“本”是指(　　)

A．孝、廉的选官标准

B．门第族望的推选依据

C．科举考试的办法

D．解决实际问题的能力