About the cost-plus pricing， which of the following statement are correct？

A.It is often the case for large， complex projects such as roads and commercial building construction.

B.The advantage for the buyer is that they can be assured of the final price they will pay.

C.It is often used when it is easy to determine the costs of the product.

D.The seller adds their required profit margin as a dollar amount or percentage to the costs once the project is complete.

正确答案：It is often the case for large， complex projects such as roads and commercial building construction.The seller adds their required profit margin as a dollar amount or percentage to the costs once the project is complete.