Many towns and cities in the High Middle Ages "grew through continuous immigration from the countryside."
The is evident that many people were moving away from villages to towns for economic reasons such as markets or trading activities.
There are other characteristics of towns during the High middle ages, such as diseases, towns being fenced, charters being given to some people, etc.
The period of the High Middle Age was between 1000 to 1250 AD.
Hence, in this case, it is concluded that the correct answer is option E. "grew through continuous immigration from the countryside."
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