Post-World War I, What Did Mustafa Kemal Do That Would

Post-World War I, what did Mustafa Kemal do that would change the region forever?

A) He led the Turkish nationalist movement in the national war of independence
B) He repelled Greek forces and kept them from capturing the former Ottoman capital, Bursa
C) He successfully argued for the signing of the Treaty of Sèvres
D) All of these answers are correct