A 27-year-old woman presents with a red rash over her cheeks, and pain and swelling in both knees as well as several small joints in her hands. She notes that the rash is worse with sun exposure. Medical evaluation reveals oral ulceration, positive ANA, and 3+ proteinuria. Which of the following is the most likely mechanism for the renal damage in this condition?
vasculitis micro-emboli anti-basement membrane antibodies deposition of circulating immune complexes