Officials are considering placing the sturgeon on the endangered species list. If such an action is taken, ships, including those that carry goods and produce, will not be allowed to travel on the large rivers in our region that serve as breeding grounds for the fish. If ship travel were restricted in this way, critics argue, prices for goods and produce would rise in the region, and some businesses might even be forced to close.

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6) If the argument about rising prices is true, then which of the following is also likely to be true?
A) The sturgeon population in the region has decreased significantly in the last decade.
B) All other means of transporting goods and produce in the region are costlier than shipping.
C) Over the years several large cities have developed along the region’s large rivers.
D) Consumer demand for goods and produce is greater in this region than in other regions.

Since the question asks about rising prices, only B) can be the correct answer as it's the only one that mentions cost.