Given that several SAS data sets exist in the SASUSER library, which one of the following is generated as output?

The following SAS program is submitted:

%let lib = %upcase(sasuser);

proc sql;

select nvar

from dictionary.tables

where libname = "&lib";

quit;

Given that several SAS data sets exist in the SASUSER library, which one of the following is generated as output?
A . no result set
B . a syntax error in the log
C . a report showing the names of each table in SASUSER
D . a report showing the number of columns in each table in SASUSER