You definitely don't want to apply ED to more than one program. By enrolling ED, you are committing to accept an offer if you get one. So, making multiple commitments of that nature is problematic and, needless to say, frowned upon.
... sure anyone can quantify if ED increases your chances and by ... experts would tell you that ED'ing tends to only work ... vs. UVA. When you apply ED every school basically has you ... everyone) than I would not ED.
... general rule of thumb, yes ED does increase your chances of ... attend whichever school you were ED accepted to. However, you might ... the tradeoffs that comes with ED - you lose leverage in regard ...