(A) Suggested edits
(B) Revision history
(D) Public sharing
If you want to advise simple changes to student work (such as adding a comma) but do not want to directly edit the document, then you can do that using the Suggested edits feature in Google Docs.
This question is a part of the Unit 7 Review of the Google for Education Fundamentals Training. You can find answers to all the Unit 7 Review questions in our Google for Education Fundamentals Training Answers page.