Can I have an explanation for this answer? The initial market rate was 5%.

d. Suppose that on July 1, 20X1, the market rate of interest increases to 6%. Given this change in the market rate, would the interest expense incurred between July 1 and December 31 be higher, lower, or the same as the interest expense had the market rate remained 5% (2 points)? Same no change - market rate @ issuance doesn't change