Which led to the 1905 revolution?

The 1905 revolution was spurred by the Russian defeat in the Russo-Japanese War, which ended in the same year, but also by the growing realization by a variety of sectors of society of the need for reform. Politicians such as Sergei Witte had failed to accomplish this.

the answer is d. give brainliest if right.

ps is this 7th grade civics?

from the conditions of the working class in england by friedrich engels,the main idea is :