The VIX is

	A.	a key figure reflecting the evolution of option prices with decreasing time to maturity.
	B.	a volatility index based on the volatility implied from the prices of the index options on ASX200.
	C.	a volatility index based on the volatility implied from the prices of the index options on S&P 500.
	D.	an approximation approach for determining prices of American call options on stocks with dividends.