9. In the grid, each small square has side of length 1 . What is the minimum distance from 'Start' to 'Finish' travelling only on edges or diagonals of the squares?
A $2 \sqrt{2}$
B $\sqrt{10}+\sqrt{2}$
C $2+2 \sqrt{2}$
D $4 \sqrt{2}$
E 6
9. C The shortest routes consist of two diagonals (right and down) each of length $\sqrt{2}$, and two sides of length 1 , giving a total length $2+2 \sqrt{2}$.