I would say none of the above as A, B, and C do not seem like sensible answers.
Yes, they are.
Mostly dentists' offices, though.
Answer:
Section breaks
Explanation:
The Breaks command, which has several options, inserts section breaks. Section breaks appear as a double-dotted line, and they store formatting instructions such as margins, page size, and page numbering formats for the section above the marker.
Answer:
Digital formats allow for lossless data storage, fast editing (without the loss of original source material, ie having to manually clip pieces of film), and made collaboration easier.