Why do prison gang members have a comparative advantage over non-gang affiliated inmates when it comes to trafficking contraband inside prisons?

A) Inmates know gangs will use force to collect payment for drugs on credit.
B) Gang members on the outside use creative,stealthy methods to deliver contraband inside.
C) Gang organization provides governance facilitating delivery and distribution.
D) all of these

All of these factors contribute to the comparative advantage of prison gang members in trafficking contraband inside prisons. Inmates know that gangs will use force to collect payment for drugs on credit, which intimidates non-gang affiliated inmates from engaging in similar activity. Gang members on the outside also use creative and stealthy methods to deliver contraband inside, which reduces the risk of being caught. Additionally, gang organization provides governance that facilitates delivery and distribution of contraband, allowing members to effectively manage and profit from their illicit activities.