The correct answer is E . Event Tree Analysis (ETA) is the commonly used technique for identifying the possible outcomes that can follow from a hazardous or initiating event. In contrast, Fault Tree Analysis (FTA) works backward from an undesired top event to identify causes , while root cause analysis , causal analysis , and five whys are primarily used after an event or problem to understand why it happened. A concise ISO 31010 summary describes ETA as modelling the possible outcomes from a given initiating event and the status of controls.

So, in exam terms, if the question asks for the approach used to identify potential outcomes from a hazard , the best match is Event Tree Analysis .