The physician has ordered the client to receive digoxin (Lanoxicaps) twice per day until a therapeutic level is attained. When the nurse takes the client’s apical pulse on the 3rd day, the pulse is 58, and the client complains of nausea. What should the nurse do next（）
A. Administer the medication and leave a note on the chart for the physician.
B. Order a serum digoxin level to be drawn.
C. Administer the medication and medicate the client for nausea.
D. Withhold the medication and notify the physician.
