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sairam595
For hundreds of years, pearl divers have gathered pearls directly from mollusks on the sea floor. This is an extremely risky profession,
exposing the divers to risks of drowning, air embolism, and shark attacks. Still, as long as society demands authentic cultured pearls,
these brave divers must continue to risk their lives.

Which of the following statements, if true, most seriously weakens the conclusion above?

A. Shark attacks on pearl divers have decreased steadily over the last three decades because of declining shark populations.
B. Cultured pearls are generally considered more beautiful than those made by artificial means.
C. Robotic pearl harvesters can gather pearls faster and at less cost than human divers, although they may disturb aquatic
communities.
D. Part of the value of cultured pearls derives from the exotic way in which they are obtained.
E. With the proper equipment and training, a diver employing scuba gear can harvest three times as many pearls per hour as
can a free air diver.

I went for E. Even though I agree with C.

How can we simply ignore the later half but? I read in above explanation that it is not the part of the argument but still?
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sairam595
For hundreds of years, pearl divers have gathered pearls directly from mollusks on the sea floor. This is an extremely risky profession,
exposing the divers to risks of drowning, air embolism, and shark attacks. Still, as long as society demands authentic cultured pearls,
these brave divers must continue to risk their lives.

Which of the following statements, if true, most seriously weakens the conclusion above?

A. Shark attacks on pearl divers have decreased steadily over the last three decades because of declining shark populations.
B. Cultured pearls are generally considered more beautiful than those made by artificial means.
C. Robotic pearl harvesters can gather pearls faster and at less cost than human divers, although they may disturb aquatic
communities.
D. Part of the value of cultured pearls derives from the exotic way in which they are obtained.
E. With the proper equipment and training, a diver employing scuba gear can harvest three times as many pearls per hour as
can a free air diver.

I went for E. Even though I agree with C.

How can we simply ignore the later half but? I read in above explanation that it is not the part of the argument but still?

I think with E, we can say that the scuba diving equipment can help prevent drowning and air embolism but we are not sure regarding prevention from shark attacks. In option C, we are not concerned with disturbance to aquatic life in the argument but with well being of the scuba divers. Hence, the correct option is C
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