Why do some people worry that eating genetically modified food may be harmful?

Some people worry because they believe there has not been enough long-term research to rule out possible effects of eating genetically modified food. This matches choice C, “There have not been enough long-term studies to prove that this food is safe.” The other choices make claims that are not the usual basis for this concern, such as saying genetic modification always lowers nutrition or that studies have shown it causes disease.

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