(I) interest rate
(II) volatility
(III) stock price
(IV) exercise price
(A) I only
(B) III only
(C) I and II
(D) III and IV
(I) interest rate
(II) volatility
(III) stock price
(IV) exercise price
(A) I only
(B) III only
(C) I and II
(D) III and IV