$7)$ Given the following statement, which statement will write "Calvin" to the file DiskFile.txt$?$

PrintWriter diskOut $-$ new PrintWriter$("$DiskFile$.$txt$")$;

A$)$ diskOut.printin$("$Calvin$")$;

B$)$ DiskFile.printin$("$Calvin$")$;

C$)$ System.out.printin$($diskOut$,$ "Calvin"$)$;

D$)$ PrintWriter.printin$("$Calvin$")$;