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Information and IdeasMediumFinding supporting a claim about a cause

Information and Ideas practice question

A vet claims that the sheep on the hill farm are losing condition because of a mineral deficiency in the grazing rather than because of parasites.

Which finding, if true, would most directly support the vet's claim?

  1. A. Sheep moved to a neighbouring farm with the same parasite load recovered within a month on grazing richer in cobalt, while those that stayed did not.Correct
  2. B. The sheep have parasites.
  3. C. Sheep on many hill farms lose condition in winter.
  4. D. The farm's grass is short.

Answer: A. Sheep moved to a neighbouring farm with the same parasite load recovered within a month on grazing richer in cobalt, while those that stayed did not.

Same parasites, different minerals, different outcome.

Why the other answers are wrong

B. The sheep have parasites.
Supports the rival cause.
C. Sheep on many hill farms lose condition in winter.
A general pattern, not evidence about the cause.
D. The farm's grass is short.
Doesn't distinguish the causes.

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