Answer: B. sudden infant death
Explanation: Although the direct cause of sudden infant death is unknown, researchers believe that it is associated with the ability of the child to wake from sleep and having hard time breathing due to the low level of oxygen present. This may often occur when babies lay on their faces which forces them to re-breathe their exhaled carbon dioxide. Since Michael and Diane are likely to get drunk from taking some alcohol, they might be putting the infant in danger of having hard time breathing if they lay down on the same bed with the infant in an awkward position.
