In year 2019, the estimated total useful life of an equipment was revised from 5 years to 6 years. The equipment was purchased on account in year 2017. Which of the following statement correctly describes this? Select one: O A. All of the choices are correct. OB. This is a change in accounting estimate in year 2019. O c. This is a change in accounting policy in year 2019. OD. This requires a correction errors in 2019 in respect of the depreciation expense recorded in 2018