Multi-choice problem: Continue writing the next sentence in this paragraph:

How to get to outland
Take the " outland!
". To gain access to the dark portal, you will need to take the " outland! " quest from either the warchief command board (horde) or the hero's call board (alliance). These can be found in all the major capital cities in azeroth.

Options:
a). Make your way underground to the shrouded caves containing the dragon stone. You can travel underground by an underground portal of the caves.
b). You will need to be at least level 58 to start the " outland! " quest. Horde players can find the boards at orgrimmar, undercity, silvermoon city and thunder bluff.
c). Log in to the world of the dark portal, and your characters will be in the party. Your character's order for the portal window will always be in the balance later on in the game.
d). You can either use either or both games. To use either game, simply enter the dungeon and the quest will tell you where you are.
b).