Final answer:
Communicable diseases kill fewer people today due to continuing medical advances, improved living conditions, and better preventive treatment.
Step-by-step explanation:
The correct answer is B. slower population growth. Communicable diseases, such as pneumonia, kill fewer people today than they did in the past due to various reasons. One of the main factors is continuing medical advances that have led to the development of more effective treatments and vaccines. Another reason is improved living conditions such as access to clean water, sanitation, and better nutrition. Additionally, better preventive treatment measures, such as education about hygiene and vaccinations, have also contributed to reducing the mortality rate of communicable diseases.
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