According to Cohen and Felson, Why Did Crime Rates Increase

According to Cohen and Felson, why did crime rates increase between 1960 and 1980?​

A) ​Because unemployment rose, resulting in an increase in motivated offenders
B) ​Because the amount of suburban neighborhoods decreased, resulting in a population shift to urban neighborhoods
C) ​Because a demographic bulge in the population resulted in an increased number of motivated offenders
D) ​Because guardians decreased as a result of increased female participation in the workforce