Which step temporarily assign a format to the sales variable?

Which step temporarily assign a format to the sales variable?
A . Proc format; Formatsales comma12.; Run;
B . Data sasuer. Shoes Set sashelp,sheoes; Format sales comma12.;
C . Proc contents data=sashelp.shoes; Format Sales comma12.; Run;
D . Proc print data= sashelp. Shoes Format sales comma12.; Run;

Answer: D