下列关于胚的组成，正确的是（　　）

A．胚芽，胚轴，胚根和胚乳

B．胚芽，胚轴，胚根和子叶

C．种皮，子叶，胚乳和果皮

D．胚芽，胚轴，胚乳和子叶

At the end of the closing process group, （）.

A．it is verified that the defined processes are completed within all the process groups to close the project phase

B．it is determined that the product of the project is completed satisfactorily

C．project management plan is written off by the project sponsor

D．new change requests are initiated as required