Based on "Conceptual Modelling: Knowledge Acquisition and Model Abstraction" by Kotiadis and Robinson, which of the following statements best capture the dual focus of conceptual modelling in simulation? (Choose two correct statements) A. Model abstraction involves selecting only the most quantifiable elements from a system description. B. Knowledge acquisition is primarily concerned with defining inputs and outputs of the simulation model. C. Simulation modellers are mainly interested in building models that avoid subjective interpretation during conceptualisation. D. The process of conceptual modelling includes understanding the problem situation and simplifying it into a purposeful activity model. E. Soft Systems Methodology offers tools such as rich pictures and root definitions that support both knowledge acquisition and model abstraction