Why does the program rail to execute?

The following SAS program is submitted:

proc sort data = work.employee;

by descending fname;

proc sort data = work.salary;

by descending fname;

data work.empdata;

merge work.employee

work.salary;

by fname;

run;

Why does the program rail to execute?
A . The SORT procedures contain invalid syntax.
B. The merged data sets are not permanent SAS data sets.
C. The RUN statement was omitted alter each or the SORT procedures.
D. The data sets were not merged in the order by which they were sorted.

View Answer

Answer: D