题目内容
（请给出正确答案）
A.grep -vE "(^#| ^$) "httpd. conf
B.grep -E "(^#| ^$) "httpd. conf
C.grep "(^#| ^$) "httpd. conf
D.grep -vE "^#"httpd. conf
如果结果不匹配，请 联系老师 获取答案
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