Which of the following best defines a real option? A) The value of a convertible bond if it could not be converted into common stock. B) The lower bound of an option's value, or what the option would be worth if it were about to expire. C) An option with payoffs in real goods. D) The right to sell an asset at a fixed price during a particular period of time. The opposite of a call option. E) A contract that gives its owner the right to buy or sell some asset at a fixed price on or before a given date