How does rational decisions occur when the marginal benefits of an action equal or exceed the marginal costs?

Rational decisions occur when individuals weigh the additional benefits of an action against its additional costs. When the marginal benefits equal or exceed the marginal costs, it indicates that the action is either profitable or at least justifiable, leading individuals to pursue it. This decision-making process ensures that resources are allocated efficiently, as actions yielding net positive benefits are favored. Ultimately, it reflects a logical approach to maximizing utility or satisfaction.