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【单选题】
The following SAS program is submitted:data WORK.DATE_INFO;Day="01" ;Yr=1960 ;X=mdy(Day,01,Yr) ;run;What is the value of the variable X?A.
the numeric value 0
B.
the character value "01011960"
C.
a missing value due to syntax errors
D.
the step will not compile because of the character argument in the mdy function.
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