During an Initial Health Assessment Interview,the Nurse Learns That the Client

During an initial health assessment interview,the nurse learns that the client is taking warfarin (Coumadin) for a history of deep vein thrombosis.Later,the client admits to taking several herbal preparations as well.Which herbal preparations would the nurse caution the client to avoid?

A) Ginkgo biloba
B) Garlic
C) Ginseng
D) Zinc
E) St. John's wort