Same- wich of the following Statements is correct? a) The cash flow for an ordinary cor deferred) anuity all occur at the begining of the b) The cash flow for an anuity due must all ey occur at the begining of the periods c) The cash flow for an anuity may vary from perod to penod, but they must occur at regular intervals, such as once a year or once a mouth d) If a series of unequel cash flows occurs cat regular intervals, such as once a year, then the series is by definition an annuity