Final answer:
The most likely diagnosis for Andrea's symptoms is Celiac disease. Celiac disease is an autoimmune disorder caused by a reaction to gluten. Symptoms include tiredness, weight loss, upset stomach, joint pain, and skin rash.
Step-by-step explanation:
The most likely diagnosis for Andrea's symptoms is D. Celiac disease. Celiac disease is an autoimmune disorder caused by a reaction to gluten, a protein found in wheat, barley, rye, and some other grains. Symptoms of celiac disease include tiredness, weight loss, upset stomach, joint pain, and skin rash. Andrea's digestive symptoms worsening after eating bread or pasta is a common characteristic of celiac disease.