我国三代领导集体都主张：在解决台湾问题的态度上，必须有坚定的原则性；在实现祖国统一的方案上，可以有选择的多样性。这体现的哲学道理是

A．矛盾的普遍性与特殊性关系

B．物质与意识的辩证关系

C．坚持适度原则

D．事物发展的前进性与曲折性的统一

When calculating the settlement payment on a long position in a London Interbank Offered Rate (LIBOR) -based forward rate agreement, the denominator is best described as :()

A. the interest differential between a loan made at the contract rate and one made at the market rate at contract expiration. 

B. a discount factor based on LIBOR at settlement. 

C. a discount factor based on the contract LIBOR rate.