On Which One of the Following Dates Is the Principal

On which one of the following dates is the principal amount of a semiannual coupon bond repaid?

A) A portion of the principal is repaid on each coupon date.
B) The entire bond is repaid on the issue date.
C) Half of the principal is repaid evenly over each coupon period with the remainder paid on the issue date.
D) The entire bond is repaid on the maturity date.
E) Half of the principal is repaid evenly over each coupon period with the remainder paid on the maturity date.