Which PROC PRINT stepbelow creates the following output?
题目图表见附件
a. | proc print data=flights.laguardia noobs; var on changed flight; where on>=160;run; |
b. | proc print data=flights.laguardia; var date on changed flight; where changed>3;run; |
c. | proc print data=flights.laguardia label; id date; var boarded transferred flight; label boarded='On' transferred='Changed'; where flight='219';run; |
d. | proc print flights.laguardia noobs; id date; var date on changed flight; where flight='219';run; |