Which of the following set of fractions are in descending order?

• A.  \[\frac{3}{6},\frac{5}{6},\frac{7}{6},\frac{9}{6},\frac{11}{6}\]    
• B.        \[\frac{9}{7},\frac{5}{7},\frac{4}{7},\frac{6}{7},\frac{3}{7}\]  
• C.         \[\frac{18}{19},\frac{11}{19},\frac{7}{19},\frac{6}{19},\frac{5}{19}\]     
• D.  \[\frac{9}{8},\frac{4}{8},\frac{6}{8},\frac{12}{8},\frac{14}{8}\]