Select every FALSE response. When a secondary source has multiple levels of tables of contents, the index becomes superfluous. Select this if no other response is correct. The research log is simply a record of the research process. Practice aids are usually written by practitioners specializing in a particular O jurisdiction and area of law. They tend to be organized by topic and can be one volume or many. A yellow signal on a federal regulation might indicate the regulation has been found to be "arbitrary and capricious" and invalid under the administrative procedures act