The Woman Taking St

The woman taking St. John's wort and gensing daily is scheduled to have a hysterectomy in 3 weeks. The nurse would instruct the woman that:

A) The herbs are not likely to cause any problems during the surgery.
B) The St. John's wort must be stopped prior to surgery, but she can continue the ginseng.
C) The ginseng should be stopped 1 week before surgery.
D) She should discontinue taking both herbs 2 weeks before surgery.