Which of the following risks were not covered in detail in most stress tests prior...

The BCBS publication 'Principles for sound stress testing practices and supervision' (May 2009) identifies all of the above as risks that were covered in insufficient detail in most stress tests prior to the current crisis. Therefore Choice 'd' is the correct answer.

For the PRM exam, you should have read this document. You should also be familiar with all the above risk types as being contributors to the crisis, and know what each of these mean.