Which of the following describes a change in an accounting estimate? Select one: A company changes the presentation of operating expenses from by function to by nature. An entity switches from the cost model to the revaluation model when accounting for its property, plant, and equipment. An entity recognises revenue when cash is received. The useful life of machinery was originally estimated to be 10 years, but based on new information available, it was changed to 12 years from the beginning of the year