Yes I did option B! I can't really remember the exact question cause I answered Russia near the start of the exam but basically I said that the growth of the Communist Party meant Stalin had complete and undeniable control to carry out the political transformation because he curated the party so it was comprised of his alliances and people who supported him (Lenin Enrollment for example). & that allowed him to pass stuff like the Kirov Decrees because the Politburo was willing to support him, thus he could away with all of his draconian measures in his political transformation.