In triangle ABC, X and Y are the points on sides AB and AC, respectively, such that XY is parallel to BC. If XY : BC =  2.5 : 7. what is the ratio of the area of the trapezium BCYX to that of the $$\triangle$$ AXY?

A

$$\frac{25}{171}$$

B

$$\frac{25}{196}$$

C

$$\frac{196}{25}$$

D

$$\frac{171}{25}$$