Which of the Following Is/are Abenefit of Normal Costing

Which of the following is/are abenefit of normal costing?

A) Normal costing enable companies to smooth out,or normalize,seasonal production fluctuations.
B) Under normal costing,a firm can quickly calculate the cost of items manufactured.
C) Under normal costing,a firm uses a predetermined overhead rate in applying overhead to each unit as the firm produces it throughout the year,rather than wait for the actual overhead rate to be determined at the end of the year.
D) All of the answers are correct.