A 40-year-old woman presents with a red wing-shaped erythema over her cheeks, which she has had for about 5 weeks. At the same time, she is always running a slightly high fever and has sore spots in her mouth. She also complains about pain in her hands, wrists, and knees. She has been on phenytoin for seizures, since she was eight. Except for that, and an appendectomy at age sixteen, the medical history is unremarkable. Blood pressure, pulse, and respiratory rate are normal. Temperature is 37.7°C. ESR 40, hemoglobin: 12.6 ml/dI, hematocrit: 40%, white cells count: 3800/ul. She is alert, oriented and has a normal neurological exam. The lab shows antihistone antibodies. what other lab would be elevated in this patient Select one: • a. CRP O b. TSH • c. procalcitonin