Read the text and choose the correct part to complete the sentence.
I was shocked to discover that this disease can seriously damage the heart and make bones brittle and easy to break. However, the most frightening aspect of the condition is that in 10% of cases it leads to the death of the sufferer. The information was terrifying, but it helped me to come to terms with the fact that someone with a severe eating disorder needs love and support and urgent medical attention.
What most shocked the writer about anorexia nervosa was that ...

• a number of sufferers die from it.
• it leads to heart disease and weak bones.
• all sufferers require medical treatment.
• it is a severe disorder.