What is the value of 4−3−2−18−7−6−5\dfrac{4-3-2-1}{8-7-6-5}8−7−6−54−3−2−1?(A) 000 (B) 15\frac{1}{5}51 (C) 14\frac{1}{4}41 (D) 13\frac{1}{3}31 (E) 12\frac{1}{2}21