Aresearcher who wishes to see if existing theories are relevant to a current set of circumstances might be best suited to a approach.

The answer is “quantitative”.

Explanation:

Quantitative approach (which majorly involves the use of observations, measurements, and the analysis of data from questionnaires, surveys or polls, etc.) might be the best approach for a researcher wants to find out if existing theories are relevant to a current set of circumstances.

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.