A firm has 4 plants that produce widgets. Plants A, B, and C can each produce 100 widgets per day. Plant D can produce 50 widgets per day. Each day, the widgets produced in the plants must be shipped to satisfy the demand of3 customers. Customer1 requires 75 units per day, customer 2 requires 100 units per day, and customer 3 requires 175 units per day. The shipping costs for each possible route are shown in the table below: Shipping Costs Customer per unit Plant 1 2 3 A $ 25 $ 35 $ 15 B $ 20 $ 30 $ 46 C $ 49 $ 35 $ 29 D $ 15 $ 26 $ 25 I The firm needs to satisfy all demand each day, but would like to minimize the total costs. The firm's problem falls within which classification? Multiple Choice O Assignment problems O Transshipment problems O Cost-benefit-trade-off O Resource-allocation O Transportation problems