Which statement about use case testing is true?

Which statement about use case testing is true?
A . The lest cases are designed to find defects in the data flew.
B . The test cases are designed to be used by real users, not by professional testers
C . The test cases are always designed by customers or end users.
D . The test cases are designed to find defects in the process flow.

Answer: D

Explanation:

Use case testing is a technique that helps identify test cases that exercise the whole system on a transaction by transaction basis from start to finish. Use cases are descriptions of how users interact with the system to achieve a specific goal. Use case testing is not focused on data flow, but rather on process flow. Use case testing can be performed by professional testers, customers or end users, depending on the context. Use case testing does not require the test cases to be designed by customers or end users, but rather by anyone who has access to the use case specifications.

Reference: A Study Guide to the ISTQB® Foundation Level 2018 Syllabus – Springer, Chapter 4, page 36.