Answer to Question 1
ANS: B
Although all aspects can be challenging, it is probably more challenging to recognize the interacting aspects of a large aggregate system in its power distribution, consensus activities, accommodation, and authority within the decision-making process.
Answer to Question 2
ANS: D
Although it is a more recently created model, the web of causation model is more useful because it illustrates the complexity of relationships among causable variables. It is not easier to understand and use as it has more variables than the three (agent, host, and environment) in the epidemiological model.