Which one of the following is the value of the automatic macro variable SYSLAST?

The following SAS code is submitted:

%macro houses(dsn = houses,sub = RANCH);

data &dsn;

set sasuser.houses;

if style = "¬";

run;

%mend;

%houses(sub = SPLIT)

%houses(dsn = ranch)

%houses(sub = TWOSTORY)

Which one of the following is the value of the automatic macro variable SYSLAST?
A . work.ranch
B . work.houses
C . WOR
D . RANCH
E . WOR
F . HOUSES