Correct Option (A)
The passage explicitly states that in a natural state, individuals operate solely based on their own advantage, without a common understanding of good or bad, or the concept of sin. These moral and ethical distinctions, including what is considered right or wrong, are presented as emerging exclusively within a civil state. This civil state is formed by common consent, establishing shared definitions of good and bad, and making individuals accountable to the state. Thus, the formation of a state is depicted as the foundational condition for the existence of conceptions of right and wrong.
Incorrect Options:
Option (B): This statement refers to a "ruling authority" as the decider of right or wrong. However, the passage emphasizes the establishment of a "civil state" through "common consent," indicating a collective agreement rather than a top-down decree from a singular authority.
Option (C): While the passage describes individuals in a natural state as consulting only their own advantage, which implies selfishness, it does not categorize them as "immoral." Instead, it suggests an absence of moral categories (good/bad, sin) in the natural state due to the lack of a shared societal framework, implying an amoral condition rather than an immoral one.
Option (D): The passage's central theme revolves around the origin and nature of moral concepts (right/wrong, good/bad, sin) in relation to the formation of a civil society. It does not address or imply that these ideas are necessary for the "survival of the human species." This aspect falls outside the scope of the provided text.