Which of the following statements is true? Group of answer choices A simplifying assumption is any assumption that affects the conclusions of a model in an important way. Economic principles are generalizations about economic behavior, and are "true" for the average person. The "Other-things-equal" assumption ("Ceteris paribus") means that all variables other than those under consideration are held constant for a particular analysis (they are assumed to not change during the analysis). All of the above. Only b) and c)