$(A) \;k=\large\frac{2}{15},\normalsize m=\large\frac{1}{9}\\(B)\;k=\large\frac{1}{15},\normalsize m=\large\frac{1}{5}\\(C)\;k=\large\frac{15}{2},\normalsize m=9\\(D)\;k=15,m=3$