What statement indicates which variable to sort by when using a PROC SORT step? Select one: O a. DATA = O b. BY O c. DATA O d. PROC SORT O e. OUT = O f. RUN g. OUT What is meant by a two-level name in SAS? Select one: a. A name that describes the library and dataset name O b. A name that describes your program and dataset name O c. A name that connects the SAS session to a library O d. A name that describes the author in the header of the file If we want to print out a dataset called "insulin" in the "medicine" library we have defined, what should we put for the DATA = option on PROC PRINT? Select one: O a. DATA = medicine.insulin O b. DATA = insulin O c. DATA = medicine O d. DATA = insulin.medicine