Final answer:
A "tickler" file is a chronologic reminder system used for organizing documents or tasks that require future attention, sorted into daily and monthly folders.
Step-by-step explanation:
A "tickler" file is best described as E. A chronologic reminder system. This type of system is used to organize documents or tasks that need to be handled at specific future dates. It's essentially a manual method of setting reminders for oneself, where documents are filed in a way that they 'tickles' your memory when you need to be reminded of them. The tickler file is often organized into 31 folders for each day of the month and 12 folders for each month of the year. Whenever there is a document or task that needs attention on a certain day, it is placed in the folder for that particular day or month. As each day passes, the folder for that day is checked for any items that need to be dealt with.