PREP CR 5

carolfeng

5.(24371-!-item-!-188;#058&000859)

Tiger sharks are common in the waters surrounding Tenare Island.Usually tiger sharks feed on smaller sharks, but sometimes they have attacked tourists swimming and surfing at Tenare's beaches.This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues.In order to help the economy, therefore, the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.

Which of the following, if true, most strongly calls into question the likelihood that implementation of the mayor's proposal will have the desired consequence?

(A) Even if not all the tiger sharks that come close to the beaches are killed, the existence of the program would reassure tourists.

(B) Business owners who depend on tourism are willing to pay most of the cost of implementing the program.

(C) Tourists come to Tenare Island for its beaches, even though the island features a number of other tourist attractions.

(D) The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.

(E) Not all tourists who come to Tenare Island enjoy swimming or surfing.

为什么是D呢？D不是support吗？？
求救！

carolfeng

明白~谢谢

cycyang

Proposal "the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches"

(D) The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.

If the tiger sharks are killed within a mile of the beaches, then the small sharks that the tiger sharks feed on would increase dramatically in number, which will result in the decrease of fishes (the small sharks feed on them) that are commercially important to the island's fisheries.

nrnr

This is my personal opinion. Not sure correct or not..
If the programs kills any tiger sharks coming near to the beach, it will reduce the volume of tiger sharks and in turn increase the volume of small sharks because there is no hunter (tiger sharks) for them. And then more fish will be eaten by small sharks and less fish will be caught by the local fisheries. Because the income from fishing industry contributes most to the annual revenue, the reduction from the fishing income may not be recovered back from the increase from the toursim industry. Therefore, the new program could hurt the local economy.

carolfeng

有人帮帮我吗