One disadvantage of the payback period is that: Oa managers may choose investments with quick payback periods to maximize short term criteria on which their own bonuses, etc. may be based. Ob. It cannot be used if the entire cost of the investment is spent at once. Oc. it cannot be used for investments with unequal cash inflows. Od, it is not useful for industries where the risk of obsolescence is high e. All of these choices are correct