[单项选择]开机时显示如下出错信息：Non-systemdiskordiskerrorReplaceandstrikeanykeywhenready.则表示（）。
A. 计算机硬件损坏
B. 非系统盘或磁盘坏了，更换磁盘后再试
C. 磁盘驱动器坏了，请更换
D. 没有磁盘驱动器，请安装

Over the past century, all kinds of unfairness and discrimination have been condemned or made illegal. But one insidious form continues to thrive: alphabetism. This, for those as yet unaware of such a disadvantage, refers to discrimination against those whose surnames begin with a letter in the lower half of the alphabet.
It has long been known that a taxi firm called AAAA cars has a big advantage over Zodiac cars when customers thumb through their phone directories. Less well known is the advantage that Adam Abbott has in life over Zoё Zysman. English names are fairly evenly spread between the halves of the alphabet. Yet a suspiciously large number of top people have surnames beginning with letters between A and K.
Thus the American president and vice-president have surnames starting with B and C respectively; and 26 of George Bush’s predecessors (including his father) had surnames in the first half of the alphabet agains
A. People with surnames beginning with N to Z are often ill-treated.
B. VIPs in the Western world gain a great deal from alphabetism.
C. The campaign to eliminate alphabetism still has a long way to go.
D. Putting things alphabetically may lead to unintentional bias.