Sir Walter Crofton:


A. established the "Irish System" that influenced the use of parole in the United States.


B. was influential in the movement to establish a police force for the city of London.


C. agreed with the classical approach to criminals.


D. believed in keeping inmates under very strict conditions

I think it's A, but not sure

Right.

To determine the correct answer, we need to examine the information related to Sir Walter Crofton and his contributions.

Sir Walter Crofton was indeed involved in the correctional system, but his work is primarily associated with prison reforms in Ireland. He introduced a system known as the "Irish System" in the mid-19th century, which placed an emphasis on the use of parole to help transition prisoners back into society. This system aimed to provide rehabilitation and reduce recidivism rates.

Therefore, based on this information, the correct answer is indeed A, as Sir Walter Crofton established the "Irish System" that influenced the use of parole in the United States.