If $$(x_{1},y_{1})$$ and $$(x_{2},y_{2})$$ are the points of trisection of the line segment joining the points (-7, 5) and (2, -4), then $$\frac{x_{1}+x_{2}}{y_{1}+y_{2}}$$

A

-5

B

$$-\frac{5}{3}$$

C

5

D

$$\frac{5}{3}$$