Some animals have been genetically engineered to grow larger. Plants have been engineered to resist diseases or insects. Some fruits have been engineered to ripen more slowly. Genetic engineering of domesticated plants and animals is controversial. According to some people, these foods pose a risk because their effects on consumers and the environment are unknown. Others claim that genetically engineered foods are safe.

Which of the following statements is an opinion about genetic engineering rather than a fact?
 

D. Genetically engineered foods are safe for consumers and the environment.

Explanation

The last sentence says that, “others claim that genetically engineered foods are safe”. This is a claim, or in another word, an opinion. It is not a fact because there is no information in the text that provides support for it. All the other statements are facts because the text provides supporting evidence for them.

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