Ms. W is a 52-year-old female with complaints of increasing fatigue and weakness over the past 4-5 months. She reports being an avid runner and has found it difficult to keep up with her usual routine. She has tried adding a multivitamin and tracking her sleep but without any noticeable changes. She is a vegetarian and states her diet is well balanced. What lab tests would you order and physical examination?
a) Complete blood count (CBC) and thyroid function tests
b) Electrocardiogram (ECG) and cholesterol levels
c) X-ray and liver function tests
d) Urinalysis and blood glucose levels