【单选题】Your patient is a 44-year-old G4P4 with symptomatic uterine fibroids that are unresponsive to medical therapy. The patient has severe menorrhagia to the point that when she menstruates, she cannot leave the house. You recommend to her that she undergo a total abdominal hysterectomy. You counsel her that she may need a blood transfusion if she has a large blood loss during the surgical procedure. Her current hematocrit is 25.0. The patient is a Jehovah's Witness who adamantly refuses to have a blood transfusion, even if it results in her death. Respect for the patient's autonomy or own wishes requires that which of the following be assessed?