Why must real options have positive value? (Select all the choices that apply) A. Having the real option but not the obligation to act is valuable B. Real options must have positive value because they can always be sold to recover the initial investment C. Real options must have positive value because they are only exercised when doing so would increase the value of the investment D. If exercising the real option would reduce value, managers can allow the option to go unexercised. You bought a stock one year ago for $5183 per share and sold it today for $57 44 por share. It paid a 51.54 per share dividend today. What was your realized return? The realized return was % (Round to one decimal place)