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Which one of the following SAS DATA steps saves the temporary data set named MYDATA as a permanent data set?

 

libname sasdata 'SAS-data-Iibrary';
data sasdata.mydata; 
copy mydata; 
run;

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libname sasdata 'SAS-data-Iibrary'; 
data sasdata.mydata;
  keep mydata; 
run;

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libname sasdata 'SAS-data-Iibrary'; 
data sasdata.mydata;
  save mydata; 
run;

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libname sasdata 'SAS-data-Iibrary';
data sasdata.mydata;
set mydata; 
run;

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