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 list of the average salaries paid to workers at different factories in a large industrial city
b. a set of newspaper articles listing the age of each deceased person in various british cities over several years
c. a chart showing an increasing gap between the rich and poor starting in the industrial revolution
d. a physical map showing the spread of railroad tracks across great britain during the 19th century

Explanation:

Mortality rates involve data on the deceased. Newspaper articles listing the age of each deceased person in various British cities over several years would directly provide relevant data for studying mortality rates. Average salaries (A), the rich - poor gap (C), and railroad track spread (D) are not directly related to mortality rates.

Answer:

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