The correct answer is: C. ordinary annuity.
An ordinary annuity is a series of equal payments made at regular intervals for a fixed period of time. The payments are made at the end of each period, such as at the end of each month or year.
An annuity due is a series of equal payments made at regular intervals for a fixed period of time. The payments are made at the beginning of each period, such as at the beginning of each month or year.
A payment fixed series is a series of equal payments made at regular intervals for a fixed period of time. The payments can be made at the beginning or end of each period.
A deferred annuity is an annuity in which the payments do not begin until after a certain period of time. This period of time is called the deferment period.
In the question, the payment of security is made at the end of each period, such as at the end of each year. This is an ordinary annuity.