A)  $\nearrow $ 

  B)  $\uparrow $ 

  C)  $\nwarrow $ 

  D)  None of these are possible. 

  A)  $\nearrow $ 

  B)  $\uparrow $ 

  C)  $\nwarrow $ 

  D)  None of these are possible. 

The forces on the person’s foot are shown in the diagram below:



Remember that friction always opposes motion or intended motion. Imagine the ground had no friction (like a sheet of ice). In that case, the person’s foot would simply slide to the left. Thus, friction must be opposing the intended motion and point to the right.

Of these forces, both the normal force and the friction force are coming from the ground, so the sum of those vectors is the correct answer.