During Reactor Operation Process Technicians Are Responsible for All of the Following

During reactor operation process technicians are responsible for all of the following except:

A) establishing correct flow or feed rates to the reactor
B) ensuring correct temperature, pressures and level
C) monitoring and controlling reaction rates (time)
D) ensure specified mixing or agitation is occurring (pumps or mechanical agitators)
E) monitor and maintain auxiliary equipment
F) calculate complex raw materials mass relationships and product economics