Which adverse effect is of greatest concern for the patient undergoing treatment for multiple sclerosis?

Several tenants from an apartment building are brought to the emergency department with concern for carbon monoxide poisoning. One patient presents with reddish-purple skin, a blood pressure of 94/48 mmHg, heart rate of 118 bpm, and altered consciousness (arouses when his name is shouted). The nurse anticipates testing will reveal which carbon monoxide level?

The nurse is educating the pregnant woman at 13 weeks’ gestation with a newly placed cerclage. The nurse tells the patient to contact the provider if which events occur? Select all that apply.