Which SQL procedure program deletes rows from the data set CLASS?

Which SQL procedure program deletes rows from the data set CLASS?
A . proc sql;
Select * from class
Where age<(select stop_age from threshold);
Quit;
B . proc sql;
Modify table class
Delete where age<(select stop_age from threshold);
Quit
C . proc sql;
Delete from class
Where age<(select stop_age from threshold);
Quit;
D . proc sql;
Alter from class
Delete where age<(select stop_age from threshold);
Quit;