As Part of the Process of Treating Phil's Episode of Manic

As part of the process of treating Phil's episode of manic behavior with lithium, the psychiatrist regularly monitored Phil's blood to ensure that:

A) Phil's blood levels of lithium did not become too low and produce symptoms of lithium poisoning.
B) the highest possible blood levels of lithium were achieved.
C) Phil's blood levels of lithium did not become too high and produce symptoms of lithium poisoning.
D) Phil's blood levels of lithium did not become too low and result in vomiting, muscle weakness, and reduced muscle coordination.