Indicate whether you agree or disagree with the following statements:

a. "To determine the theoretical value of an option, we will need some measure of the price volatility of the underlying asset. Because financial theorists tell us that the appropriate measure of risk is beta (that is, systematic risk), then we should use this value."

b. "If the expected price volatility of an option increases, the theoretical value of an option decreases."

c. "It does not make sense that the price of a call option should rise in value if the price of the underlying asset falls."