Which type of marxism holds that ruling class profit, power, and prestige are directly and easily identifiable in the everyday functioning of the criminal justice system?

The correct answer is instrumental Marxism. 

Instrumental Marxism refers to a theory of Marxism which states that policymakers, those in authority and of elite status share common interests and motivations, which is reflected in the way the criminal justice system is designed. In other words, the criminal justice system is designed in a way so as to safeguard and promote the interests and dominance of the elite or 'ruling' class. 

Iprobably use google