Check Compatibility is used to verify that critical Excel 2013 features are not lost when a workbook is opened in an earlier version of Excel

Modern echo cancellation equipment

a. only allows a half-duplex connection b. are necessary even for local calls c. can never be disabled d. selectively removes only the echo

In the accompanying figure, item 5 is a ____ effect added to a photograph.

A. frame B. call out C. highlight D. drop shadow