Which of the Following Statements Best Summarizes What Researchers Know

Multiple Choice

Which of the following statements best summarizes what researchers know about how lithium produces its beneficial effects in the treatment of bipolar disorder?

A) Lithium works by reducing blood levels of the neurotransmitter GABA.
B) Lithium increases the brain's ability to absorb oxygen.
C) Lithium increases brain levels of dopamine and reduces brain levels of serotonin.
D) Lithium helps stabilize levels of an excitatory neurotransmitter called glutamate in the brain.