Doug,
I wanted to say thank you for your thorough instructions and recommendations. Chris H above, Thank you for responding my question as well. You guys are awesome. Today, my professor emailed me back my original post with her comments. She also said that instruction was very helpful.
Following up, I tried Doug's first suggestion. Went to history and found all my posts. I was able to locate my original content, but without my instructor's comments.
I emailed Doug's Assignment Enhancement feature info to my professor. Then, kindly asked her to email me my original file with her comments. I even suggested her to take a screen shot if she can see all my posts and her comments. This morning I received what I needed. Thank you so much!