Which source is not a valid data source for a mail merge? database outlook contacts excel worksheet pdf document

Idon understand these and need some ! ?

1. how do you view the edited document without the track changes markup? a. select accept all changes in document in the accept drop-down menu.b. click on restrict editing in the protect group.c. click on the reviewing pane drop-down menu in the tracking group.d. click on final in the display for review drop-down menu.

What is workflow? how do you create your own workflow?