I'm not sure how to explain this

Which of the following is a decision that follows the net marginal benefit principle? Choosing among different roller coasters based on their distance from the theme park entrance. O Deciding to order a dessert at a non-buffet restaurant more often than you have dessert at a buffet. Deciding whether to spend one more hour studying for an exam. Choosing to give up eating meat due to concerns regarding the treatment of animals. Explain your reasoning: This ungraded area will provide insight to your instructor. I 500 Characters remaining