how is criminal behavior explicable according to rational choice theory?

It would be helpful if you phrased your questions in regular English and explained your terms.

explicable ???

rational choice theory ???

??

question pertains to the rational choice theory of crime.
Explicable like explainable.

Rational choice theory states that people will act in their own best interests. Criminals tend to see their crimes as acting in their own best interest -- at least economically.

http://en.wikipedia.org/wiki/Rational_choice_theory_(criminology)