Explain why there have been changes in the work of the police in the period from c1900 to the present day

Explanation:

At the turn of the century, public perceptions about prisons needs to transform. Prisons were frequently recognized as a kind of punishment in and of themselves. The growing crime rate after 1945 resulted in a significant growth in the jail population. Overpopulation and, at occasions, an access to education and courses have resulted as a result of this.

i believe it d) heterogeneous