In mcculloch v. maryland, a. the constitution's "necessary and proper" clause permits congress to take actions when it is essential to a power that congress has b. the constitution's commerce clause gives the national government exclusive power to regulate interstate commerce c. congress may not act to subject nonconsenting states to lawsuits in state courts d. the states may not regulate interstate commerce e. the national government's authority to require state officials to administer or enforce a federal regulation is limited

There are many benefits to using folders when working with lots of files.  Here are a few examples:

- You can use folders to sort your files by type, almost like drawers in a desk, so you might have folders for Music, Photographs, Documents, etc.

- You can use folders to group files together into a specific group.  For example in your Photographs folder you might have a folder titled BirthdayPhotographs for all the photographs from your birthday.

- As in the example above you can nest folders to create sub-categories.  Documents might include folders for Homework, Stories, Poems

- Folders can have different permissions applied to them, allowing you to keep personal files in a private folder only you can access, or secret files in a folder that doesn't show up in the normal list of folders!

The answer should be a.