Which of the Following Best Describes the Achievement That Lemuel

Which of the following best describes the achievement that Lemuel Shattuck is well known for in the United States?

A) Publishing the census of Boston, which demonstrated the effect of sanitary reforms
B) Demonstrating the usefulness of vital statistics by analyzing environmental data
C) Developing ideas about public health care reform, which were eventually adopted
D) Establishing a state board of health to deal with the problems he had noted