In an online Purchase Order Case, the customer enters their details in the Enter customer details Step, then selects the products they want to purchase in the Select products Step. The customer needs to view the selected products in the Review selected products Step before proceeding with the payment. The selected products are copied to a new field in the Review selected products Step.

Which configuration best achieves the requirement?
A. Configure a post-processing Data Transform for the Review selected products Step.
B. Configure a post-processing Data Transform for the Select products Step.
C. Configure an activity in the pre-processing Action for the Select products Step.
D. Configure an activity in the post-processing Action for the Review selected products Step.