The premium of a put option on common stock would decrease if:
I. Holding all else equal, the price of the underlying stock goes up.
II. Holding all else equal, the volatility of the underlying stock goes down.
III. Holding all else equal, the time to expiration gets shorter.
A. Only III is true
B. I, II, and III are true
C. Only I and II are true
D. Only I and III are true
E. Only II and III are true