Which of the following is the largest fraction?  $$\dfrac{2}{6}$$,$$\dfrac{2}{7}$$,$$\dfrac{2}{8}$$,$$\dfrac{2}{9}$$ 
选项为:A:$$\dfrac{2}{5}$$  B:$$\dfrac{2}{7}$$  C:$$\dfrac{2}{11}$$  D:$$\dfrac{2}{9}$$  E:$$\dfrac{2}{10}$$  请回答其中一个选项.