Which program displays a listing of all data sets in the SASUSER library?

Which program displays a listing of all data sets in the SASUSER library?
A . proc contents lib = sasuser.all; run;
B . proc contents data = sasuser.all; run;
C . proc contents lib = sasuser._alI_; run;
D . proc contents data = sasuser._all_; run;

View Answer

Answer: D