Multiple choice

Directions: Read the following information carefully and answer the question given below.

Asbestos, a flame-resistant insulator used in the electrical processes, causes lung tumor in rats, but only when the rats are exposed to large quantities of its fibrous dust. To inhale a quantity of fibrous dust is equivalent to that inhaled by the rats in studies, a worker would have to work in the dust for 18 hours a day. Therefore, it is safe to use Asbestos in electrical processes.

In order for the conclusion that Asbestos is safe to use in electrical processes to be properly drawn, which one of the following must be true?

  1. Lung tumors from exposure to airborne substances develop more quickly in people than they do in rats.

  2. If all insulators that are used in electrical processes were tested, researchers would discover that some cause lung tumors in rats.

  3. Workers work in Asbestos fiber environment fewer than 18 hours a day.

  4. Workers and users are less likely to incur severe burn injuries when Asbestos is used in the electrical process.

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

You are being asked to state the assumption. The only way this argument works is if workers work fewer than 18 hours a day.

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