下列描述与溶原性转换有关的是（）

A.白喉棒状杆菌产生白喉毒素

B.产气荚膜梭菌产生卵磷脂酶

C.肉毒梭菌产生肉毒毒素

D.肠产毒大肠埃希菌产生ST毒素

E.甲型流感病毒发生的抗原转换

To ensure the project team provides the functionality the customer expects in a new piece of software, the project manager asks the customer for sign-off on the design criteria. These documents are ______ .

A) technical specifications
B) performance specifications
C) product descriptions
D) quality assurance