Chapter 16, Problem 14E

I am searching for the accurate solution to this general accounting problem with the right approach.

Which of the following is a characteristic of process cost accounting system? Material, Labor and Overheads are accumulated by orders Companies use this system if they process custom orders Opening and Closing stock of work in process are related in terms of completed units Only Closing stock of work in process is restated in terms of completed units

Please provide the answer to this general accounting question using the right approach.