According to the Focus on Neuroscience Box: the Addicted Brain

According to the Focus on Neuroscience box: The Addicted Brain, one effect of the biochemical changes that occur as a result of addiction to alcohol, heroin, cocaine, or amphetamines is that:

A) anxiety creates a vicious circle of insomnia and sleeplessness.
B) the normally reinforcing experiences of everyday life are no longer reinforcing or satisfying.
C) people make poor decisions because of damage to the frontal lobes.
D) inhibitions are lowered and there is a general loss of social self-consciousness.