Choice B is the best answer. In (lines 21-24"It ...in"), the authors of Passage 1 state society's "common happiness" is dependent on women never becoming involved in politics. In this context, the authors of Passage 1 are suggesting that all members of society can have a "common," or shared, happiness.
Choices A, C, and D are incorrect because in this context, "common" does not mean average, coarse, or similar.