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At approximately what quantity does the Curve 1 cross the average total cost curve? Cost curvos $250 Curve 2 Curve 1 200 Point B Curve 3 150 Point A 100- Point C 0 1 2 3 4 5 6 7 8 9 10 11 Quantity of output (per day) Select one: O a. 3 units of output. O b. the minimum point of curve 2. O c. point A. O d. 4.3 units of output