Option C. The quote "Two and two make five" captures 1984's theme of conformity.
Explanation:
Conformity is the action in accordance of prevailing social standards, attitudes and practices. In the novel 1984 written by George Orwell, the quote "two and two make five" is used as a slogan to portray how society, in the novel, has immersed itself in conformity, that it does not question any standard given to them by the government, even if it is one that it is clearly incorrect.