Answer:
The answer is surprisingly.
There are many factors involved in the improvement in the life expectancy such as sanitation, housing, scientific research to cure many diseases and infections, education etc.
Historically it was the nineteenth and early twentieth century when all these improvements were made due to which the mortality rate decreased intensively in early and middle ages.
The second sentence's style is appropriate for a job application.
I think the most logical answer from my research is option c.
I'm not sure, but I tried.
Check out this website: http://www.notablebiographies.com/Ch-Co/Chaplin-Charlie.html .
It's really detailed and might help you find answers to your question.
I think it’s B, alliteration, due to the repetitive uses of ‘s’ and ‘f’ (faintly falling, soul swooned, etc.) I’m not positive but I hope this helps some :)