奇艺期权都是欧式期权吗？

问题如下：

Monte Carlo simulation is suitable for pricing options in which of the following cases?

I.An Asian option on a stock market index (payoff based on average stock price).

II.A look-back put option on XYZ stock (payoff based on maximum or minimum stock price).

III.An American call option on ABC stock (possible early exercise).

IV.A cash-or-nothing call option (i.e., binary option) on SCU stock (payoff is fixed amount or nothing).

选项：

A.

I and IV

B.

I, II, and IV

C.

II and III

D.

III and IV

解释：

Monte Carlo simulation is suitable for pricing options in each case except when early exercise of the option is possible. This means that the Monte Carlo approach could not accurately price the American call option. Monte Carlo simulation is very useful for options with price-dependent paths (such as Asian options and look-back options) and can also handle options with complex payoff, such as binary options.