 The theory also focuses on the determinants of the individual choices (methodological individualism).Rational choice theory then assumes that an individual has preferences among the available choice alternatives that allow them to state which option they prefer.These preferences are assumed to be complete (the person can always say which of two alternatives they consider preferable or that neither is preferred to the other) and transitive (if option A is preferred over option B and option B is preferred over option C, then A is preferred over C).