缝合时出现皮肤创缘内卷的主要原因是（）。

A.进针过深

B.打结过紧

C.组织富裕

D.两侧进针深度不一致

E.皮肤切口两侧进针间距大于皮下间距

Which of the following statements regarding forward contracts is TRUE()

A. The buyer of a forward contract has agreed to deliver the underlying asset at a specific price and date in the future whereas the seller has agreed to accept delivery of the underlying at the same agreed upon price and date. 

B. When prices increase, the buyer of a forward contract gains and the seller of a forward contract loses. 

C. The buyer of a forward contract gains when prices decrease, and the seller of a forward contract loses when prices increase.