What is the result when the one’s complement of a number is added to itself?

Referring to the picture above, which callout points to a set of storage devices where files can be located?

A. A B. B C. C D. D

The ____________________ is a special tool that allows you to copy custom views, tables, filters, data maps, forms, calendars, macros, toolbars, and other customizations from one project file to another.

Fill in the blank(s) with the appropriate word(s).