消防通道的宽度不应小于多少米？疏散楼梯最小宽度是多少米？

Which of the following statements regarding a plain vanilla swap is FALSE()

A. The notional principal amounts are exchanged at contract initiation and at the termination of the swap.  

B. Only a net payment is made on each settlement date.  

C. If interest rates decrease, the swap has a negative value to the fixed rate payer.