Using vi, you want to save changes to the file myfile with :w!, but vi complains it cannot write to the file. Therefore, you want to check the write permissions on the file. To do this without leaving vi, you type:()
A、A. :!ls-I myfile
B、B. :\ls-l myfile
C、C. esc :Is -I myfile
D、D. :?ls-l myfile