crackman给的答案是B，有的地方说是A。.....

想请问一下这个题究竟怎么解答，raw data指的是什么，怎么判断？感谢！

29. The following SAS program is sumbitted:

  dataWORK.INFO;

    infile 'DATAFILE.TXT';

    input @1 Company $20. @25 State $2. @;

     ifState=' ' then input @30 Year;

     elseinput @30 City Year;

    input NumEmployees;

  run;

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

     A. 1

     B. 2

     C. 3

     D. 4