羊的妊娠期平均为（）天。

A.100

B.120

C.150

D.180

A project manager spent some days to create a multi-page document which he called project charter．The document should have been issued by the project sponsor．The sponsor found the document outsized and asked for a condensed document．Which of the following is not normally an element of the project charter ？（）

A．The formal authorization to apply organizational resources to project activities

B．Detailed control account and work package descriptions

C．The business need that the project was undertaken to address

D．The product description or a reference to this document