Final answer:
The minimum number of trucks needed to transport all the shipments is 2.
Step-by-step explanation:
To find the minimum number of trucks needed to transport the shipments, we need to calculate the total weight of the shipments and divide it by the maximum capacity of each truck.
Total weight of the shipments: 2,000 lb + 5,000 lb + 20,000 lb = 27,000 lb
Number of trucks needed: 27,000 lb ÷ 25,000 lb = 1.08 ≈ 2
Therefore, the minimum number of trucks needed to transport all the shipments is 2 (option B).