What shows proper foot positioning when driving?

• Your foot moves smoothly from the brake to accelerator while your heel stays on the floor
  Explanation:

  "Your foot pivots smoothly from brake to accelerator while your heel is kept on the floor."
• Your foot moves smoothly from the brake to accelerator while your toes are on the floor
• Your foot moves smoothly from the brake to accelerator while your heel lifts off the floor
• Your toes move smoothly from the brake to accelerator