According to the social contract, individuals do what is best

1. for themselves
2. for their family
3. for their community
4. for society as a whole

4. For Society As A Whole

Explanation:

The theory of social contract envisions that people would tend to live together based on their inherent natural morals. It simply relies on the premise that people come together to establish a union and by so doing creates agreements that helps to foster co-existence and dependencies within the societal framework. Marriages are a sort of social contracts that are very essential to the society as whole.

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oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%