Which statement about the warning-signs claim is supported? (Passage: Rationing of insulin)
In 1923 the first commercial insulin became available, transforming type 1 diabetes from a fatal condition into a manageable one. Early supplies were extracted from the pancreases of cattle and pigs, so output was limited by slaughterhouse supply. In 1978 scientists produced human insulin using bacteria into which the human gene had been inserted, and it came into clinical use in the 1980s. The new method removed dependence on animals, but some patients reported that they could not sense the early warning signs of low blood sugar as well after switching, a claim that trials have not consistently confirmed.
Answer and explanation
Correct answer: C. Trials have not consistently confirmed the claim
- Step 1: Read the last sentence. Step 2. The passage says the claim has not been consistently confirmed. Answer: Trials have not consistently confirmed the claim. Why not the others: 'Disproved' overstates; claimants were patients; animal insulin users are not discussed.
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