The increasing order of the fractions $$\frac{6}{7}, \frac{7}{8}, \frac{5}{6}$$ and $$\frac{4}{5}$$

A

$$\frac{7}{8} < \frac{6}{7} < \frac{5}{6} < \frac{4}{5}$$

B

$$\frac{5}{4} < \frac{5}{6} < \frac{7}{8} < \frac{6}{7}$$

C

$$\frac{7}{8} < \frac{6}{7} < \frac{4}{5} < \frac{5}{6}$$

D

$$\frac{5}{4} < \frac{5}{6} < \frac{6}{7} < \frac{7}{8}$$