When the import declaration is conducted, the person in charge of the matter should submit, together with the import declaration form, the following commercial and shipping documents, they are ______.

A．Invoice and B/L only

B．Invoice, B/L, Packing list only

C．Invoice, B/L, Packing list, the duty exemption certificate issued by Customs

D．none of the above

下列有关生态系统稳定性的叙述，错误的是（）

A.生态系统具有自我调节能力，这是生态系统稳定性的基础

B.生态系统内部结构与功能的协调，可以提高生态系统稳定性

C.生物多样性对维持生态系统稳定性具有重要作用，体现了其间接价值

D.生态系统中的组成成分越多，食物网越复杂，生态系统恢复力稳定性就越强