According to terence thornberry, is a function of a dynamic social process that changes over time.

Life is a dynamic social process such that as people travel and interact through the course of life they are bormbarded by changing views, perceptions  and experiences which results to change of behavior thus causing a change in direction. According to thorn berry, life is a function of a dynamic process that changes with time and interactions are vital in shaping the behavior of an individual. Normally attachment to peers, parents and social institution change over time.

Ithink the answer is b : )