Given \[a=1\frac{5}{7},b=\frac{1}{4},c=\frac{1}{9}\]and \[d=\left( -1\frac{1}{4} \right),\] evaluate \[a(b-c)\div d\]

• A. \[\frac{-4}{21}\]                                 
• B.        \[\frac{-6}{23}\]
• C. \[\frac{-5}{27}\]                               
• D.        \[\frac{4}{21}\]