Câu 10: A00-211: SAS Base Programming for SAS 9

After a SAS program is submitted, the following is written to the SAS log:105 data WORK.JANUARY;106 set WORK.ALLYEAR(keep=Product Month Quantity Cost);107 if Month='JAN' then output WORK.JANUARY;108 Sales=Cost * Quantity;109 drop=Month Quantity Cost;-----ERROR 22-322: Syntax error, expecting one of the following: !,!!, , *, **, +, -,, , =, >, >=,AND, EQ, GE, GT, IN, LE, LT, MAX, MIN, NE, NG, NL,NOTIN, OR, ^=, |, ||, ~=.110 run;What data set option could be attached to WORK. JANUARY to replace the DROP statement that generated the error in the log?

1. A. (drop Month Quantity Cost)
2. B. (drop Month, Quantity, Cost)
3. C. (drop=Month, Quantity, Cost)
4. D. (drop=Month Quantity Cost) — đáp án hiện tại