Mrs Jones went to see her GP as she had noticed she had lost weight even though she felt she was eating more. On examination Mrs Jones had sweaty, erythematous plams, a rapid and bounding pulse and upper lid retraction.

Following further examination and investigations a diagnosis of Graves' disease was made, which of the following is most closely linked with Graves' disease?

A) Diarrhoea

B) Increased free T3

C) Dysphagia

D) Fever

E) Pretibial myxoedema