This Zen task is one of the most difficult to recognize as it widely varies in its structure and can easily be conflated with its opposite task of best principle for example. That part of the principle strand zooms out, whereas the task for today's post zooms in to the specifics.
The correct answer to a best example of principle question will map onto the principle in all the relevant relationships and degrees. Thus, the same strategy of identifying actors, their relationships, and degrees of certainty that works for the extrapolation strand will also apply for this task.
The example explanations are from the June 2007 Sample PrepTest. The question stem for this task is very difficult to identify, so be sure to actively read it to determine the principle you're looking for. Marking the stimulus for actors and relationships with both highlighter and pencil will help you make a clean prephrase of the components you'll look for in the answer choices.