In the Mid-Nineteenth Century, the Term "The Eastern Question" Referred

In the mid-nineteenth century, the term "The Eastern Question" referred to

A) the question of whether European powers should allow the Ottoman Empire to continue to exist.
B) the question of whether European powers shoudl allow the Qing dynasty to continue to exist.
C) the question of which European power should have most-favored nation status in trade with the Ottomans.
D) the problem of growing Russian military power.
E) escalating military tensions between China and Japan.