When bonds issued at the same time mature on different dates, they are referred to as bonds?

When bonds issued at the same time mature on different dates, they are referred to as serial bonds.
A serial bond is a bond issue that is organized with the goal that a bit of the extraordinary bonds develop at regular intervals until the point that the greater part of the bonds have developed. Since the bonds develop progressively finished a time of years, these bonds are utilized to back activities that give a predictable wage stream to bond reimbursement.

Ithink the answers would be a and c and e!