Which of the following is NOT a source of adverse effects of inflation on an economy Inflation: （）

A. distorts the information delivered by prices.

B. affects product prices without changing underlying resource prices, such as wages, in the long run.

C. increases the uncertainty accompanying investment and other activities involving future payments.

根据《长途光缆波分复用（WDM）传输系统工程验收规范》，设备发货之前，一般是由（）组建厂验小组，，在设备供应商的工厂，对工程所采购的设备进行现场抽样检验。

A.建设单位

B.设计单位

C.施工单位

D.监理单位