29.The following SAS program is sumbitted:

  data WORK.INFO;
     infile 'DATAFILE.TXT';
     input @1 Company $20. @25 State $2. @;
     if State=' ' then input @30 Year;
     else input @30 City Year;
     input NumEmployees;
  run;

How many raw data records are read during each iteration of the DATA step?

     A. 1
     B. 2
     C. 3
     D. 4

Answer: A
我怎么觉得选B呢？if then 后的input 没有带@，下面的input NumEmployees是不是就另起一行了？