Which statement best summarizes why the Ottomans wanted to take over Constantinople?

Controlling Constantinople would ensure that the Ottomans would be able to take over the rest of Europe and complete their empire. The Ottomans wanted to take revenge on Europeans for the Crusades.
Controlling Constantinople would ensure dominance over major trade routes and make the Ottoman Empire very wealthy.
The Ottomans wanted a home base that was not in Asia so they could take over the Mongol Empire.

Controlling Constantinople would ensure dominance over major trade routes and make the Ottoman Empire very wealthy.