问题如下图：
选项：
A. 
B. 
C. 
解释：
想听一下中文的解释是什么
NO.PZ2016031201000007 利率互换产生的现金流是指购买或发行bon产生的固定or浮动利息吗
NO.PZ2016031201000007 the cret seller provis protection to the cret buyer. the buyer hthe right to purchase the unrlying from the seller. A is correct. interest rate swis finea rivative in whitwo parties agree to exchange a series of cash flows: One set of cash flows is variable, anthe other set cvariable or fixe B is incorrebecause a cret rivative is a rivative contrain whithe cret protection seller provis protection to the cret protection buyer. C is incorrebecause a call option gives the buyer the right to purchase the unrlying from the seller. b怎么翻译和理解
请问B是哪里不对？我觉得和答案没什么区别。请问区别是什么？ 到底又什么不同
