All eyes in Europe were focused on the West Asian Continent, with the sole exception of the Prussian Government. They had no choice, for they had a host of messes of their own to clean up before they could spare the energy to concern themselves with the troubles of others.
Even though the Ottoman Empire was a potential ally of the Kingdom of Prussia, this had no effect whatsoever. England and France dared to aid the Ottoman Empire, but the Prussian Government could not even dream of intervening.
From the perspective of the Kingdom of Prussia, a strong Ottoman Empire would indeed be in their interest, but supporting the Ottoman Empire would mean offending Austria.
This multiple-choice question was easy to answer. England and France had strong powers and feared not Austria's retaliation; if they were going to stab from behind, they did just that.