"However, ... some persons will commit crimes no matter how well society treats them." This final sentence is the counterpoint to the "doctrine" in question, signaled by "however." The doctrine would reject that some people commit crimes regardless of their social influences, or said in a different way, social reform would curtail crime. The answer is D.
Carcass wrote:
That social institutions influence the formation of character has become a generally accepted proposition. This doctrine views individuals as but compliant recipients of social influence: personalities are entirely the products of society, and at any point in life an individual's personality can be changed by management of the social world. Crime is said to exist only because society has in some ways failed in its responsibility to give every person the resources to lead a productive life. However, whereas it is true that extreme poverty forces some people to steal, it is obvious that some persons will commit crimes no matter how well society treats them.
Which of the following is implied by the "doctrine" described in the passage above?
(A) Social institutions may reflect personality as much as they shape it.
(B) Social influence on personality is most strongly felt by the affluent.
(C) The concentration of wealth in the hands of a privileged few accounts for the existence of crime.
(D) Bringing about social reform is the most likely means of curtailing crime.
(E) Less severe punishment of crime would be likely to result in more crime.