The answer is A, failure of the Treat of Versailles. That was in the end of World War I.
Answer: The 1905 revolution was spurred by the Russian defeat in the Russo-Japanese war (1904–1905), but also by the growing realisation by the people of the need for reform, after politicians such as Sergei Witte failed to accomplish this.
Explanation:
The Executive branch has the power to appoint judges by the Senate has to approve the picks.
So, this is a clear example of a check on the executive's power.