What is the legal limit for tetrahydrocannabinol concentration (THC) in blood when driving on highways?

• 0.05 nanograms per milliliter of whole blood
• 0.5 nanograms per milliliter of whole blood
• 5 nanograms or more per milliliter of whole blood
• 50 nanograms per milliliter of whole blood
  Explanation:

  "It is illegal to operate a motor vehicle on highways with a cannabis tetrahydrocannabinol concentration (THC) of either 5 nanograms or more per millilitre of whole blood or 10 nanograms or more per millilitre of other bodily substance."