Which of the following statements is NOT true of carbon monoxide?

• A.CO is poisonous
• B.CO is readily oxidized at room temperature by air to form CO₂
• C.CO may be prepared by reducing CO₂ mixed with coke heated to about 1000^oC
• D.CO may be prepared by heating charcoal with a limited amount of O₂
• E.CO is a good reducing agent