In some questions on Academia, it happens that some questions should be closed for more than one reason. For instance, a questions is about undergraduates, and at the same time it should be closed because of it's content for asking a shopping question. Which one do you choose, being off-topic because it is about undergraduates or being a shopping question?
This also applies to broad questions. I mean, some questions ask about a list of relevant websites or journals in an area of science; this question may be closed for being too broad or for the reason of being a shopping question. Which reason do you choose to vote to close a question? Being a shopping question or being too broad?
My question here is, as a person deciding to close a question; how do you give priority in choosing such reasons? Which reasons are more important to be checked and to be in mind when judging on-topicness of questions?