A corporation issues a bond that generates the following cash flows. If the periods are of 3-month intervals, which of the following best describes that bond?

Year	0	1	2	3	....	59
Cash flows		$57.5	$57.5	$57.5	$57.5	$57.5

a. a 15-year bond with a notional value of $5000 and a coupon rate of 1.2% paid annually

b. a 60-year bond with a notional value of $5000 and a coupon rate of 4.6% paid quarterly

c. a 15-year bond with a notional value of $500 and a coupon rate of 4.6% paid quarterly

d. a 30-year bond with a notional value of $5000 and a coupon rate of 3.5% paid semiannually