将apache配置文件中的端口号直接修改为8080，可用（）

A.grep’s/listen.*/listen8080/’/etc/httpd/conf/httpd.conf
B.sed-i’s/listen.*/listen8080/’/etc/httpd/conf/httpd.conf
C.sed’/listen.*/d’/etc/httpd/conf/httpd.conf
D.sed-n’/listen.*/p’/etc/httpd/conf/httpd.conf