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What is one limitation of the myplate guidelines

Ana is a hospital researcher. she wants to preserve organs for further study in a chemical that is called formalin. prior topreserving the organs, ana wants to familiarize herself with the hazards of using formalin. ana should consult formalin'sa. materials safety data sheet.b. date of expiration.c. date of manufacture,d. additional laboratory uses,

What risk factors do people in urban areas have, regardless of their individual behaviors? what conditions are they at risk for?answer quickly i need the answer