Eck suggests that blocking changes to make crime more difficult, riskier, less rewarding or less excusable is one of the oldest forms of crime prevention.

Eck suggests that opportunity to change, to make crime more difficult, riskier, less rewarding or less excusable is one of the oldest forms of crime prevention.

In accordance with the Crime Opportunity theory, criminals rationalize the decisions they make, therefore they choose forms of stealing where they obtain great rewards with little effort or risk. This is why the crime would depend on a person willing to commit a crime and the conditions to commit a crime. Following this approach, Eck has suggested that one of the ways in which crime can be diminished is Opportunity Blocking as crime prevention, if it is made more difficult to carry out a crime, and the rewards received are diminished, people will desist from committing the crime.

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Ithink it's a, but i might be wrong