单项选择题
Which command will set the core size file to unlimited ……
Which command will set the core size file to unlimited for the user‘webapp’？（）
A.no -p 'core=-1' webapp
B.chuser 'core=-1' webapp
C.setsenv -attr 'core=unlimited' webapp
D.chsec -f '/etc/security/limits' 'core=-1' webapp
