Answer:
When interest rates rise, the coupon rates on newly issued bonds will increase.
Explanation:
When there is an increase in the interest rate of the market so it decrease the price of the outstanding bonds due to which the new bond become costlier. Also the coupon made on the outsanding bond could not be adjusted but at the same time it can rise for the new bond so that the bond could become attractive. This is due to as the investors are interested in purchasing these bonds that provides the high coupon payment on periodic basis
Therefore the above should be the answer