答案：B

解析：

Choice B is the best answer. After explaining that men may claim certain advantages but women "outrank" them when it comes to "character," the speaker asserts that women can mold the character of a country and should "endeavor to have our republic stand foremost among the nations of the earth, wearing sobriety as a crown and righteousness as a garment and a girdle." In other words, the speaker thinks women voters have a responsibility to improve the nation’s morality and virtue.