A Middle-Aged Male Walks into the Emergency Department Complaining of Chest

A middle-aged male walks into the emergency department complaining of chest pain radiating to the neck, shortness of breath, and nausea. His heart rate is 120 and BP is 94/60. The ED physician recognizes the patient is having an acute MI with decreased cardiac output. The nurse identifies the nausea to be in response to

A) the patient not having a very high pain tolerance.
B) hypoxia exerting a direct effect on the chemoreceptor trigger zone.
C) the patient not having digested his meal completely.
D) fear of having to make major lifestyle changes.