How do you implement a solution?

A flow action calls a pre-processing data transform to initiate values. There are several flow actions available for the assignment. You want to make sure that the values are only initiated once for each flow action.

How do you implement a solution?
A . Do nothing. The pre-processing data transform is only called once for each assignment.
B . Make sure that the flow action does not have the highest likelihood since it will always be invoked.
C . Configure the data transform as post-processing instead of pre-processing.
D . Add logic to the pre-processing data transform to test if values were already initiated.

Answer: D

Explanation:

Reference: https://collaborate.pega.com/QUESTION/pre-processing-flow-action