Kathleen Has Symptoms Such as Fatigue and Pain

Kathleen has symptoms such as fatigue and pain. Friends are sometimes skeptical Kathleen is suffering from a real ailment until she is diagnosed with fibromyalgia, which is controversial as there is no scientific consensus on the illness. However, with the diagnosis, her friends become more supportive and offer more assistance to Kathleen. Which of the following perspectives would best explain this case?

A) feminist theory
B) symbolic interactionist theory
C) conflict theory
D) postmodern theory