54.Consider the following data step:

data WORK.TEST;
    set SASHELP.CLASS(obs=5);
    retain City 'Beverly Hills';
    State='California';
run;

A. The RETAIN statement is fine, but the value of City will be truncated to 8

bytes as the LENGTH statement has been omitted.

    B. Both the RETAIN and assignment statement are being used to initialize new

variables and are equally efficient. Method used is a matter of programmer preference.

     C. The assignment statement is fine, but the value of City will be truncated

to 8 bytes as the LENGTH statement has been omitted.

     D. City's value will be assigned one time, State's value 5 times.

Answer: D

对D表示不懂