HACCP (Hazard Analysis and Critical Control Points) is a systematic preventive approach to food safety. There are seven principles of HACCP. The first three are:
(A) Conduct a hazard analysis: Identify potential hazards.
(B) Determine the Critical Control Points (CCPs): Find the points in the process where control can be applied to prevent or eliminate a hazard.
(C) Establish critical limits: Set the maximum or minimum value to which a parameter must be controlled at a CCP.
"Food manufacturing" (D) is the industry where HACCP is applied, but it is not a principle of HACCP itself. Therefore, only A, B, and C are correct principles.