as the quantity of a good increases, which of the following is true in the elastic region of a monopolist's demand curve? responses marginal revenue and total revenue are negative. marginal revenue and total revenue are negative. marginal revenue is increasing, and total revenue is positive. marginal revenue is increasing, and total revenue is positive. marginal revenue is decreasing, and total revenue is negative. marginal revenue is decreasing, and total revenue is negative. marginal revenue is positive, and total revenue is increasing. marginal revenue is positive, and total revenue is increasing. marginal revenue is negative, and average revenue is decreasing.