Explanation
Of the options given, the BEST risk calculation methodology would be Potential Loss x Event Probability x Control Failure Probability. This exam is about computer and data security so 'loss' caused by risk is not necessarily a monetary value.
For example:
Potential Loss could refer to the data lost in the event of a data storage failure.
Event probability could be the risk a disk drive or drives failing.
Control Failure Probability could be the risk of the storage RAID not being able to handle the number of failed hard drives without losing data.