which answer is correct? why ?

[tianerhu]

please give me the explain， Thank you.

[Shmuel · Accepted solution]

Since YEARS_SERVICE = 1 ("the employee has been with the company one year")

then AMOUNT=0.

Calculating AMOUNT_PER_YEAR involves division by AMOUNT.

Division by zero yields missing value (answer D) 

[tianerhu]

Thank you .

[ballardw]

Type code that does something similar using the values in the question.

Look at the log.

3    data example;
4       x=0;
5       y=5;
6       z= y/x;
7    run;

NOTE: Division by zero detected at line 6 column 8.
x=0 y=5 z=. _ERROR_=1 _N_=1
NOTE: Mathematical operations could not be performed at the following places. The results of the
      operations have been set to missing values.
      Each place is given by: (Number of times) at (Line):(Column).
      1 at 6:8
NOTE: The data set WORK.EXAMPLE has 1 observations and 3 variables.

X here is substituted for "amount", Y is "years_service".

[tianerhu]

Thank you for your help.