The correct answer is: D. Deferred annuity
An annuity is a series of equal payments made at regular intervals for a fixed period of time. An ordinary annuity is an annuity where the first payment is made at the end of the first period. A deferred annuity is an annuity where the first payment is made at some later date in the cash flow. A perpetuity is an annuity that continues forever.
Here is a table that summarizes the key differences between the three types of annuities:
| Type of annuity | When payments start | When payments end |
| — | — | — |
| Ordinary annuity | End of first period | End of last period |
| Deferred annuity | Some later date in the cash flow | End of
| Perpetuity | Never | Never |
I hope this helps! Let me know if you have any other questions.