Making a decision at the margin is possible only in situations where

There are options

Decision making is the process by which a choice is made between different options or possible ways to solve different situations in life in different contexts: business, labor, economic, family, personal, social, etc. (using quantitative methodologies that provides the administration). The decision-making consists, basically, in choosing an option among the available ones, in order to solve a current or potential problem (even if there is no evidence of a latent conflict).

it should be c, women were allowed to vote in all states because federal law supersedes state law.

"states can make their own laws, as long as they don't contradict what the federal law states. the states do not have the authority to pass a law that negates a federal law." -google

c- companies fail to take environmental protection into account. i think