The correct answer is A. Everyone, and weights everyone’s happiness equally.
Step-by-step explanation:
John Stuart Mill was a prominent philosopher in economics and also in "utilitarianism". According to Mill, utilitarianism focuses on promoting actions that support the happiness of individuals, while avoiding those that restrict happiness. Additionally, Mill proposes the greatest-happiness principle that implies individuals should act to promote happiness in all "sentient beings", this means actions should consider the happiness of everyone. Also, each action should produce the greatest happiness, which means it should make the most individuals happy. In this context, the happiness of each individual should is equally important. Therefore, utilitarianism takes into account the happiness of everyone, and weights everyone's happiness.