Mmmm!
Attacking in the West before the USA arrives seems most likely to deliver a quick CP victory, but this is what happened and it failed. Might G have pursued this strategy more effectively than it did?
Attacking in the Balkans is attractive. There is a view that the allies should have used British naval supremacy to pursue a broad Balkan strategy, instead of throwing ever more men into the blood and death of disastrous attacks on the western front. In effect that Gallipoli was the right idea badly executed. As I remember it, Ludendorff resigned as a result of allied progress in the Balkans late in the war? So throwing the allies out of the Balkans had some importance, but it would not have ended the war.
Similarly Italy, I think, even had that allied power surrendered.
Leaving me with adopting a defensive posture … so I voted for that. But G’s ability to keep fighting was being squeezed out of it by the economic blockade. Yet G may have gained a better peace from losing the war by this approach?