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To prevent harbor porpoises from getting tangled in its nets and suffocating, a fishing company installed acoustic alarms on all its boats that fish in waters off Massachusetts. The sound emitted temporarily disorients the porpoises and frightens them away. Since the installation of the alarms, the average number of porpoises caught in the company's nets has dropped from eight to one per month. The alarms, therefore, are saving the lives of harbor porpoises in those waters.

Which of the following is an assumption on which the argument depends?

【选项】Environmentalists advocate the use of acoustic alarms as a means of protecting the harbor porpoise population.

选项是否正确?

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题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:PREP07 Test 2-29
正确率:80%