Question 8 (1 point) Which of the following is an example of marginal analysis? (A) To determine the optimal number of workers, a firm calculates the net benefits of hiring an extra worker. O B) To determine the optimal output that a firm should sell, the manager calculates the total revenue earned by selling different levels of output. a) To determine the optimal amount of fertilizer to be used, a farmer calculates the total benefits of using a given amount of fertilizer. O.D) To choose the optimal apartment to rent, an individual estimates the net benefits of renting an apartment close to his place of work