This question-will ask you to provide a line of missing code.
Given the following data set WORK.SALES:
The following program is submitted:
Which statement should be inserted to produce the following output?
A. Qtr1 = sum(of month {*});
B. Qtr1 = sum(of month {3});
C. Qtr1 = month{1} + month{2} + month {3};
D. Qtr1 = sum(of month{_ALL_});