ABC company issued a bond on Jan. 1st, 2018. ABC Company prepared the following amortization schedule for the bond.
Date	Cash Paid	Interest Expense	Decrease in Carrying Value	Carrying Value
1/1/2018				$104,212
12/31/2018	$ 7,000.00	$6,253	$747	$ 103,465.00
12/31/2019	7,000	6,208	792	$ 102,673.00
12/31/2020	7,000	6,160	840	$ 101,833.00
12/31/2021	7,000	6,110	890	$ 100,943.00
12/31/2022	7,000	6,057	943	100,000

The bonds have a life of:

a.

4 years.

b.

Cannot be determined from the given information.

c.

3 years.

d.

5 years.