The inept leadership forced Russia to discontinue fighting in World War I. Option C is correct. The leaders were irresponsible and clumsy at their work so that their troops were poorly trained.
Russia entered into World War I on August 1, 1914, when Germany declared war on it. World War I was a global war initiated in Europe that protracted from 28 July 1914 to 11 November 1918. It was considered as "the war to end all wars."