NO.PZ2023040401000084
问题如下：
The value of a European put option can be either directly or inversely related to the:
选项：
A.
exercise price.
B.
time to expiration.
C.
volatility of the underlying.
解释：
B is correct. The value of a European put option can be either directly or indirectly related to time to expiration. The direct effect is more common, but the inverse effect can prevail the longer the time to expiration, the higher the risk-free rate, and the deeper in-the-money is the put. The value of a European put option is directly related to the exercise price and the volatility of the underlying.
按照答案逻辑，时间越长，call option也要面对利率降低的风险啊
