If you start from a corner on cube, what is max number of edges you can trace if you never trace the same edge twice?

Question

If you take a marker & start from a corner on a cube, what is the maximum number of edges you can trace across if you never trace across the same edge twice, never remove the marker from the cube, & never trace anywhere on the cube, except for the corners & edges ?

A6

B7

C8

D9

Select from the options above.

Correct Option: 4