At Level 2, each segment is one third (1/3) the length of the segments at Level 1.
So it's one third of L (L/3) over three ((L/3)/3), which is L over nine (L/9),
and you can see there are sixteen (16) segments.
That is four (4) times the number at Level 1.
And so L over nine (L/9) times sixteen ((L/9) x 16) is (16/9)L,
so the answer is "D."