25 pairs of observations of $$(x_{i}, y_{i})$$ yield $$\sum x_{i} = 125, \sum y_{i} = 100, \sum x_{i}^{2} = 650, \sum y_{i}^2{}= 436, \sum x_{i}y_{i} = 520$$. If the transformation $$u_{i} = x_{i} - 3, v_{i} = y_{i} - 3$$ is done, then the correlation coefficient of $$(u_{i}, v_{i})$$ is

A

$$\frac{2}{3}$$

B

$$-\frac{2}{3}$$

C

$$\frac{7}{8}$$

D

$$\frac{6}{9}$$