38) Female,35 years old in the past six months, she had recurrent fever with joint swelling and pain in both hands,periungual erythema and purpura in both lower extremities. Laboratory examination...

38) Female,35 years old in the past six months, she had recurrent fever with joint swelling and pain in both hands,periungual erythema and purpura in both lower extremities. Laboratory examination showed tinrombocytopenia, positive urnine protein, and decreased complement. The most likely diagnosis is? A Systemic lupus erythematosus B Rheumatoid Arthritis C Allergic purpura D Vasculitis E Glomerulus nephritis