Question

Which of the following pieces of data would be most helpful to a researcher who would like to study mortality rates in British cities during the Industrial Revolution? A. A chart showing an increasing gap between the rich and poor starting in the Industrial Revolution B. A list of the average salaries paid to workers at different factories in a large industrial city C. A physical map showing the spread of railroad tracks across Great Britain during the 19th century D. A set of newspaper articles listing the age of each deceased person in various British cities over several years

Answer 1

For a researcher that wants to study mortality rates an information that is not about mortality, or the lenght of human life would not be relevant. So we can reject answers that mention wealth (A and B) or infrastructure (C).

The correct answer is the one that lists the relevant information: the lenght of life.
Correct answer:
 D. A set of newspaper articles listing the age of each deceased person in various British cities over several years

Answer 2

D. A set of newspaper articles listing the age of each deceased person in various British cities over several years