The pesticide DDT proved harmful to predatory birds because it
O a. caused thinning of the birds' eggshells
O b. caused mutations in the birds' offspring
O c. killed the birds when they ate it
O d. killed animals the birds preyed upon
O e. allowed invasive species to spread
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The pesticide DDT proved harmful to predatory birds because it
O a. caused thinning of the birds' e...
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