Problem: Jeanne is 19 years old and has a BMI of 13.9. Due to her dangerously low weight, she has been hospitalized. After examination and evaluation, Jeanne is diagnosed with severe anorexia nervosa. What will likely occur due to this condition? Group of answer choices She will have abnormally high blood levels of estrogen. She will experience rapid cycling. She will stop having her period. She will have increased brain activity of the neurotransmitter serotonin.