Be aware that you are to use only that information you find freely available electronically on the Internet or in print media. Basically, you will use only the information anyone can find if they enter the relevant search terms. Your task is to use the skills presented and discussed during this study period in class to evaluate the claims given the information you find.
So, because most people do not have access to university libraries, the academic literature behind paywalls is not to be used. If academic literature sits behind a paywall, you cannot use it. Imagine you are an average person who sets out to find information on the claim you select.