Answer :
The spread of an infectious disease can not create a functional region.
A functional region refers to a geographical area which is centered around specific focal point with a specific function.
An example of functional region includes
- trade route
- transportation hub
- shopping center
- recreational center etc
So, a functional region might be created by
- a public transportation system
- the broadcast area of a local television station
- the influence of an elected official
- the customer base of a particular business
Therefore, the Option D is correct because the spread of an infectious disease can not create a functional region.
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