What is the information security principle that requires significant tasks to be split up so that more than one individual is required to complete them?

In the accompanying image of a Microsoft Word 2016 document, which of the following boxes points to the Undo button?? ?

A. ?Box A B. ?Box B C. ?Box C D. ?Box D

How do you open the panel in the accompanying image?

A. Click Window on the Menu bar, then click the name of the panel. B. Click View on the Menu bar, then click the name of the panel. C. Click the Keywords button on the Favorites panel. D. Click the Keywords button on the Metadata panel.