OE for reference:
Overview: This passage first draws a distinction between manners and morals: Manners necessarily involve a social element; morality does not necessarily involve a social element. Then the passage spells out what this means in the case of manners. You are asked to identify the answer choice that is most strongly supported by these statements.
The Correct Answer:A The passage claims that the rules of etiquette—manners—are necessarily social in nature, that is, they apply only when other people are involved. And it claims that morals differ from manners in that morals are not necessarily social in nature, that is, morals can apply when no other people are involved. So it must be possible to violate the rules of morality when no other people are involved. And if no other people are involved, no other people are harmed. So (A) is supported by the statements in the passage.
The Incorrect Answer Choices:B According to the passage, manners are necessarily social in nature, but morals are not necessarily social in nature. This leaves open the possibility that immoral acts are sometimes social in nature. So the passage leaves open the possibility that there are immoral acts that are also violations of the rules of etiquette.
C The passage, by saying that morals do not necessarily involve other people, implies that there are cases in which the rules of morality apply when a person is alone, but the passage does not support the position that those rules apply only then.
D The passage does not differentiate between morality and manners in terms of their importance. Thus the statements do not support (D).
E The passage says that morals are not necessarily social in nature, which leaves open the possibility that some things that are social in nature are subject to the rules of morality.