Elevated erythrocyte sedimentation rate

A 38-year-old man comes to the clinic with a swollen, sausage-like left middle finger along with diffuse joint swelling of his left hand and right foot over the past three days. The patient also has scaly plaques with well-defined borders along the skin just distal to both elbows. His uric acid level is within normal limits. Which of the following is most likely to be seen in this patient?

(A) Antigliadin antibodies
(B) Elevated erythrocyte sedimentation rate
© Negatively birefringent crystals in joint fluid
(D) Positive rheumatoid factor
(E) Weakly positively birefringent crystals in joint fluid