The supreme court decision in gray v. sanders (1963) was instrumental in a) establishing the "one person, one vote" standard for legislative districting. b) overturning the long-standing "separate but equal" standard in education. c) legalizing a woman's access to abortion services. d) giving young people more voting rights.

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the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.