Which of the following statements pertaining to software testing approaches is correct?

A.
A bottom-up approach allows interface errors to be detected earlier.

B.
A top-down approach allows errors in critical modules to be detected earlier.

C.
The test plan and results should be retained as part of the system’s permanent documentation.

D.
Black box testing is predicted on a close examination of procedural detail.

Explanation:
This is an absolute best practice in the software testing field, you should always
have to keep all your testing approaches with the results as part of the product documentation.
This can help you in the case you have problems with some tasks or components of the software
in the future, you can check back your testing and results and see if the system was making the
tasks correctly and if anything changed from that environment.