Which of the following is not correct about options and the markets in which they trade?

	Implied volatility shown in the 'IV' column on the CBOE platform is the annualized standard deviation of the underlying stock's return that traders currently use to price options on the stock
	When a CBOE-traded Call option is exercised, the writer of the Call delivers the underling shares to the buyer of the option
	I want to delta-hedge one long MSFT Put option bought on the CBOE. If the option's delta is -0.55 (-55%) then I would buy 55 MSFT shares to be delta-neutral
	Calls and Puts traded on the CBOE are American style
	all the above are correct