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What are pandemic diseases?

Adiseases that spread from person to person through contaminated water sources
Bdiseases that are transmitted by parasites, such as mosquitoes
Cdiseases that are specific to a particular place, climate, or region
Ddiseases that spread over a large area and affect large numbers of people

Verified Answer :

Pandemics are diseases that spread over large areas and affect large numbers of people. The Black Death in the 14th century killed nearly one quarter of Europe's population. The Spanish Flu, in 1918, killed more people than WWI.

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Answer: D

Explanation: diseases that spread over a large area and affect large numbers of people