A bond is currently trading for 98.72 per 100 of par value. If the bonds YTM rises by 100 basis points, the bonds full price is expected to fall to 93.66. If the bonds YTM decreases by 100 basis points, the bonds full price is expected to increase to 105.78. The bonds approximate modified duration is closest to:

A/ 122.78

B/ 12.28

C/ 6.14

D/ 61.39