Under Which Circumstance Is Deferral of Informed Consent Allowable

Under which circumstance is deferral of informed consent allowable?

A) The patient is confused and does not appear to understand the plan of treatment or the consent form.
B) The patient who is in cardiac arrest is transported to the emergency department without accompaniment by family members.
C) The surgeon requests that the patient be transferred to the surgical suite before the nurse has an opportunity to obtain the patient's informed consent.
D) The patient is crying due to severe pain and is unable to verbalize understanding of the treatment plan.