What is the difference between the biggest and the smallest fraction in the given fractions? \[\frac{2}{3},\frac{4}{5},\frac{5}{6},\frac{3}{4}\]

• A.  \[\frac{1}{12}\]      
• B.                   \[\frac{1}{20}\]         
• C.       \[\frac{1}{30}\]         
• D.       \[\frac{1}{6}\]