The correct answer is "demographic environment".
<span>A demographic environment is described as a seres of demographic aspects, which includes gender or ethnicity. Industries use the demographic environment in order for them to identify their target markets for their specific good or services to be availed. An example of a demographic aspect can be gender, population, age range, range of people with their income level.</span>
An adverb phrase describes how something is done: when, where, how (quickly, fast, etc). There is no adverb phrase in the following sentence:
I wrote an essay about the origins of American folk music.
The correct answer is then: adjective phrase, which is : of American folk music.
or, another adjective phrase: about the origins of American folk music.
Answer: c
Explanation: because of the deal, many people after the great depression got jobs and would support their familes.