下列有關「自體抗體與風濕病疾病之間的關係」的組合中，何者最具有特異性？
rheumatoid factors - Sjögren’s syndrome
anti-Scl 70 antibodies - mixed connective tissue disease
anti-histone antibodies - systemic lupus erythematosus
anti-CCP antibodies - rheumatoid arthritis
