I read it as "advanced data":( ..something like tech-related data...

I missed "probably" in A..

IT'S BACK NOW!!!!! YEY!

Experiencing the same problem. I refreshed the webpage, re-logged in but still don't see the check marks on the left side of syllabus. So I can't tell which lesson I have finished so far, and from which one to resume. #HELP

I even didn't know what is wrong with the argument ... sigh,..