The word "them" in the sentence is used as the indirect object. The correct answer would be option B. It is used as the indirect object because it is being affected by the verb used in the sentence. The subject or the doer of the action is "sandy", the verb is "showed" and the direct object is "her coin collection" making "them" as the indirect object.
ANSWER: B. generate essay topics
If you are looking into magazines as a student, then normally you are just in the first step of your writing process. In this stage, you should still be on the process of finding what to write about, thus turning to the magazine as a resource. Therefore, you scan magazine images and articles to find some inspiration on what to write about.