$B = \dfrac{-3}{11} × \dfrac{-22}{66} ×\dfrac{121}{15}$
$= \dfrac{(-3)×(-2)×121}{11×6×15}$
$=\dfrac{11}{10}$
$C = \dfrac{1}{4}×\dfrac{7}{3}×12$
$=\dfrac{7×12}{3×4}$
$=7$
$D = \dfrac{3}{7}×\dfrac{2}{5}×\dfrac{7}{3}×\dfrac{19}{72}$
$=\dfrac{2}{5}×\dfrac{19}{72}$
$=\dfrac{19}{180}$