Todd,
First of all - don't worry about this particular question for your exam. From the point of view of risk management ask yourself the following questions: How likely is it that you will have a similar question on the exam? What would the impact be? Now you see how quickly this one, small item becomes irrelevant to your success.
And now my explanation.
The answer lies in understanding the difference between the technique of Reserve Analysis and Contingency Reserve itself. On a very basic level you will use the Reserve Analysis to determine how much reserve/contingency you will need. But the question clearly says that we already know that the reserve is 15%. So there is no need for an analysis because you already know how much. So clearly "Reserve Analysis" is the wrong answer.
Let's go ahead and rephrase the question so that the answer would be "Reserve Analysis":
Question 13: You are trying to determine how much of your baseline hardware cost to set aside in order to counteract the risk of hardware cost increases as well as technological advances. What is this called?
Voila... now the answer is Reserve Analysis because you need to first analyze how much you will put aside.
Good luck on your exam and please post your success story in our Lessons Learned forum!