Multiple choice

A certain bacteria in the intestines of hens and other fowls form a non-resistant strain that renders the animals immune to respiratory tract infection. Humans currently must be supplied with vaccines in order to be rendered immune to respiratory tract infection. So if genetic engineering technology can succeed in introducing bacteria that can survive in the human intestine, the need for vaccines will be reduced.

Which one of the following is a presupposition of the above argument?

  1. The bacteria would produce the non-resistant strain in human intestines.

  2. This is currently the only bacteria strain that must be countered by a vaccine.

  3. There have been no attempts to create vaccines from the bacteria present in the intestines of some birds.

  4. Hens are currently the only birds that can produce its own protection against influenza.
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A Correct answer
Explanation

For the bacteria to help people in the same way that it helps hens, the bacteria must work in the same manner in humans as it does in hens.

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