Retest the changed area and then use risk assessment to decide on a reasonable subset of the whole regression test to run in case other parts of the system have been adversely affected.
Logging the outcome of test execution.Evaluating the options:
The question is about not a major task. Option a is a major task. So eliminate this. Option b is not a major task. (But yes, logging of outcome is important). Option c and d both are major tasks of Exit criteria. So eliminate these two.
The answer is B