You are driving a commercial bus (coach) or a heavy truck with a GVM of more than 13.9 tonnes. You are offered an alcoholic drink during lunch. You refuse because your blood alcohol limit has to be:

• A. Zero.
• B. Under 0.02.
  Explanation:

  "The level is 0.02. Although, bear in mind that any alcohol in your system will affect your ability, even if you can't notice it."
• C. Under 0.05.