Which setting results in each measure produce different results?

The following code is used for EOP headcount and SOP headcount:

If((in([%EMP_JOB_INFO_T.EMPLOYMENT_STATUS%], ‘A’,’U’,’P’) OR

ISNULL([%EMP_JOB_INFO_T.EMPLOYMENT_STATUS%])),

[%#CFT#.HEAD_COUNT%], 0) .

Which setting results in each measure produce different results?
A . Measure override name
B. Standard measure
C. Data type
D. Aggregation type

Answer: A