Of the six (I must be missing something important here. If you can think of a better E please add it to the comments.) I would go with eLearning. No email. No eLearning... eLearning - what is it? Now, ...
Back in January 2012 I made 10 eLearning prediction for 2012... I really do think that this has been on the rise. There has certainly being increased coverage and talk about it in the "blogosphere".