A Patient Says,"I Have Taken Megadoses of Vitamin E for 3

A patient says,"I have taken megadoses of vitamin E for 3 months to improve my circulation,but I think I feel worse." Which action should the nurse take first?

A) Explain to the patient that megadoses may be harmful and advise caution.
B) Assess the patient for symptoms and signs of toxicity from excess vitamin exposure.
C) Assess for signs of circulatory integrity to determine whether improvement has occurred.
D) Educate the patient that research has not shown that megadoses of vitamins produce benefits.