Which best describes how the fall of Constantinople to Ottoman Turks affected Europe?

A) The Ottoman Empire spread Eastern Orthodox Christianity into southeastern Europe including Greece and Italy.

B) The Ottoman Empire captured Constantinople’s gold supply, causing rapid inflation in Europe’s economy.

C) The Ottoman Empire was able to expand northward from Constantinople and gain control of Vienna and all of Hungary.

D) The Ottoman Empire now stood as a gatekeeper of east-west trading routes, affecting Europe’s economy.

My guess is D but I'm not 100% sure