25. The diagram shows two equilateral triangles. The distance from each point of the smaller triangle to the nearest point of the larger triangle is $\sqrt{3}$, as shown.
What is the difference between the lengths of the edges of the two triangles?
A $2 \sqrt{3}$
B $4 \frac{1}{2}$
C $3 \sqrt{3}$
D 6
E $4 \sqrt{3}$