Which statement is true?

The following SAS program is submitted:

data work.total;

set work.salary(keep = department wagerate);

by department;

if first.department

then payroll = 0;

payroll + wagerate;

if last.department;

run;

The SAS data set named WORKSALARY contains 10 observations for each department, and is currently ordered by DEPARTMENT.

Which statement is true?
A . The BY statement in the DATA step causes a syntax error.
B. The statement payroll + wagerate; in the DATA step causes a syntax error.
C. The values of the variable PAYROLL represent the total for each department in the WORK.SALARY data set.
D. The values of the variable PAYROLL represent a total for all values of WAGERATE in the WORKSALARY data set.

Answer: C

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