13. A test plan included the following clauses among the exit criteria:
- System test shall continue until all significant product risks have been covered to the extent specified in the product risk analysis document.
- System test shall continue until no must-fix defects remain against any significant product risks specified in the product risk analysis document.
During test execution, the test team detects 430 must-fix defects prior to release and all must-fix defects are resolved. After release, the customers find 212 new defects, none of which were detected during testing. This means that only 67% of the important defects were found prior to release, a percentage which is well below average in your industry. You are asked to find the root cause for the high number of field failures. Consider the following list of explanations:
I Not all the tests planned for the significant product risks were executed.
II The organization has unrealistic expectations of the percentage of defects that testing can find.
III A version-control issue has resulted in the release of a version of the software that was used during early testing
IV The product risk analysis failed to identify all the important risks from a customer point of view.
V The product risk analysis was not updated during the project as new information became available
Which of the following statements indicate which explanations are possible root causes?