【单选题】

An elderly client's lithium level is 1.4 mEq/L. She complains of diarrhea, tremors, and nausea. The nurse's first action is to
A．hold the lithium (Lithobid) and notify the physician.

B．reassure the client that these are normal adverse effects.
C．administer another lithium dose.
D．discontinue the lithium.