S1 문장의 [______]에 들어갈 단어는?

난이도 고난도 · 힌트를 덜 열수록 높은 점수 (현재 5점)
Writing of a commentary by Lenin on Leo Tolstoy, the critic Pierre Macherey agrees with Lenin's [______] that Tolstoy's work holds up a mirror to the Russian revolution of 1905.