60. Given the data setSASHELP.CLASS:      

  Name     Age

  -------  ---

  Mary      15

  Philip    16

  Robert    12

  Ronald    15

  The following SAS program is submitted:

  %macro MP_ONE(pname=means);   

     proc &pname data=SASHELP.CLASS;     

     run;   

  %mend;     

  %MP_ONE(print)

  %MP_ONE()  

  Which PROC steps execute successfully?

A. PROC MEANS only

B.PROC PRINT only

C.PROC MEANS and PROC PRINT      

D.No PROC steps execute successfully   

变型的话 如果将 means print 对调 答案是不是选B？