Which of the following best explains why economists must rely on the assumption of ceteris paribus\textit{ceteris paribus}ceteris paribus when constructing and testing economic models?
To transform normative value judgements into objective, verifiable physical laws of human behaviour.
To isolate the relationship between specific variables within a complex social system where multiple factors are changing simultaneously.
To ensure that economic models are purely deductive and do not require empirical testing or statistical data.
To guarantee that all individual consumers behave in a perfectly rational and predictable manner under all market conditions.
