Implied volatility is: 32 Not yet Marked Flag Select one: O a the volatility of call option prices measured from historical prices Ob the volatility of stock prices measured from historical option prices Od the volatility of stock prices that equates the Black-Scholes option price to the option's market price. d. the volatility of call option prices that equates the Black-Scholes stock price to the share's market price. e. None of the above