Select the correct answer.

What was the main factor that helped the Meiji Restoration prevent the colonization of Japan?

A. The restoration restored the tradition of Japanese martial arts, which helped combat Western forces.
B. More ports were readily opened to trade with the West, eliminating the need for colonization.
C. The Japanese gained US protection after the signing of the Treaty of Kanagawa.
D. Rapid modernization and the formation of a strong military made Japan very powerful.
E. The restoration helped the Japanese conquer European colonies, shifting the balance of power.