Firms’ costs, revenue and objectives — practice question

The table presents a firm's average revenue at different output levels. Output and average revenue ($): 1 → 10, 2 → 8, 3 → 6, 4 → 4. How does total revenue change as output increases?

• AIt falls and then rises.
• BIt falls continuously.
• CIt rises and then falls.
• DIt rises continuously.