Jim Haggerty, an analyst with Harbor Capital Advisors, is analyzing the price sensitivity of a 10 -year $1,000 par value corporate bond priced at par with a 6 percent semiannual coupon. The bond is currently callable at 102 percent of par and putable at a price of 98 percent of par. The effective duration of this bond for a 0.25 percent change in interest rates is closest to: A. 5.00 . B. 7.44 . C. 7.76 . D. 8.00