An investor planning to sell IBM stock in 30 days who believes that IBM's price will be very volatile in the near future can best protect himself against price risk by

A) selling an IBM call option that matures in 30 days

B) buying an IBM put option that matures in 30 days

C) buying an IBM call option that matures in 30 days

D) selling an IBM put option that matures in 30 days

The value of a call option ____ price of an underlying falls. and the value of a put option with the same price and expiration dat____ when the spot

A) does not change; does not change

B) falls, increases

C) increases; falls

D) increases; increases