I wanna say the answer is- B.
I might be wrong,so if I am,I'm sorry
A. Islam was the predominant religion in the Ottoman Empire~
Using simple words, imperialism is a policy of certain country involving a will of extending its power by using any kind of pressure or force.
For example - In 1939 Nazi Germany together with Soviet Russia jointly invaded Poland, in the result, both countries extended its borders.
The answer is, Battle of Fort McHenry