Which of the following statements regarding option delta is false?

	a.	It is a measure of risk that shows the sensitivity of option price to changes in the price of the underlying asset
	b.	It is equal to the number of shares of the underlying stock you need to buy to hedge a short position in one option contract
	c.	It is increasing with underlying price for a call option but not for a put option
	d.	It is an increasing function of the underlying price for both a call and a put option