I need information about "World of Warcraft: Wrath of the Lich King" expansion pack, if anyone can help me please?

I wondered if someone could give me some information on Wrath of the Lich King, 1. Do I need the disc to play? 2. Can I install it on multiple machines with the activation key? 3. If I get a new computer, no need to purchase an activation code for Wrath of the Lich King?

Judging from WoW and WoW TBC 1.You just need the drive to install it. 2.Yes the key updates to the activation of your account only to WOTLK. 3.No, it may become your account is updated.

Wrath of the lich king Cd key gen Blizzard Scam Updated !