The answer is...
B. Buffers
Yes, rural areas should be concerned about contagious diseases since they affect rural healthcare systems and citizens' quality of life, mortality, and healthcare expenses.
Though urban areas offer better living circumstances than rural ones like improved housing, sanitization, ventilation, and social services, but they are potential hotspots for the fast transmission of infectious illnesses due to the population density and frequent contact between residents.
On the other hand, rural areas may not have a high population density, yet they should still be concerned about contagious diseases since they lack the facilities and better healthcare that urban areas have.
As a result, both urban and rural areas should be concerned about the spread of infectious illnesses.
Read more about Contagious diseases:
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I have not seen my blood type on my birth certificate or on others birth certificate.
Answer:
They could eat healthier, like replacing junk food with healthier options, and exercise more by maybe going for walks instead of sitting around watching TV