<span>Develop theories based on their research is something that they always do in their work.
Sociologists will always tried to find the explanation of various social phenomenons. In order to find the answer, they need to formulate initial theories and conducted several researches/experiments in order to proof whether their theories are correct.</span>
I believe that the answer is b, I hope this helps
Social changes can lead to higher stress levels because it is not easy for human beings to disconnect from old bonds and form new ones in an instant.
<h3>Financial Changes and Stress Level</h3>
Financial changes can also result in higher stress levels because having money is crucial to the well-being of people. More of it is likely to improve one's comfort and less of it can create lots of stress.
<h3>What are stress levels?</h3>
These are the amount of stress that one may undergo under a given circumstance.
Lower stress levels are known to be healthier for the human body.
See the link below for more about Stress levels:
brainly.com/question/1603954
One of the main nations envolved is the United States