Consider the following user story for an Agile project aimed at developing an application that calculates the reimbursement of medical visits:

"As an owner of the application, I want the reimbursement of medical visits to be calculated based on the following rules:

There are two types of reimbursable visits: Doctor's Office Visits (DOCVs) and Hospital Visits (HVs).

The reimbursement for DOCVs is 33%, while the reimbursement for HVs depends on the type of the specialist visits. Two types (A, B) of specialist visits exist and the associated reimbursements are 45% for A and 90% for B."

Which of the following would you expect to be the most suitable black-box test design technique for the user story?