Who initiated strikes in March of 1917 in Russia and why?

I also look up exact questions, from my honors history homework; in the hopes that those before me have paved a path to the light. Yet, the great quest for answers continues, and the long fought war seems to have no end. but stay strong my fellow student, let us fight for or lazy intuition, as we live in the shadow of fear. a fear that one day we will actually have to open our history textbooks.