柴油机不易起动，且起动时排气管冒出大量白烟，其故障原因可能是（）。

A、供油时间过早

B、温度过低柴油失去流动性

C、供油时间过迟

D、温度过高

When a party to a forward contract terminates the contract prior to the original expiration date by entering into a perfectly offsetting forward contract with a second counterparty:()

A. the party terminating the forward contract has no default risk, but both counterparties face default risk. 

B. there is no future liability, but default risk remains for all parties until the original contract settlement date. 

C. the party terminating the contract is exposed to default risk, but has no further asset price risk.