13.The following SAS program is submitted:

data WORK.TEST;

    set WORK.MEASLES(keep=Janpt Febpt Marpt);

    array Diff{3}  Difcount1-Difcount3;

    array Patients{3} Janpt Febpt Marpt;

run;

What new variables are created?

     A. Difcount1, Difcount2 and Difcount3

     B. Diff1, Diff2 and Diff3

     C. Janpt, Febpt, and Marpt

     D. Patients1, Patients2 and Patients3

Answer: A

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14.Which of the following programs correctly invokes the DATA Step Debugger:

        A.

data WORK.TEST debug;

   set WORK.PILOTS;

   State=scan(cityState,2,' ');

   if State='NE' then description='Central';

run;

     B.

data  WORK.TEST debugger;   

   set WORK.PILOTS;

   State=scan(cityState,2,' ');

   if State='NE' then description='Central';

run;

     C.

data WORK.TEST / debug;   

   set WORK.PILOTS;

   State=scan(cityState,2,' ');

   if State='NE' then description='Central';

run;

     D.

data  WORK.TEST / debugger;

   set WORK.PILOTS;

   State=scan(cityState,2,' ');

   if State='NE' then description='Central';

run;

Answer: c

想问一下那个data语句后面加debug是什么意思，还有本题为什么选择C呢？