The nurse refers an older adult client for further evaluation after the nurse assesses warm skin and brown pigmentation around the ankles. The nurse suspects which of the following?

A. Stasis ulceration: While stasis ulcers can occur in the context of venous insufficiency, the description of warm skin and brown pigmentation more directly suggests venous insufficiency. B. Arterial occlusion: This condition typically presents with cold, pale skin and possible pain or cramping, rather than warm skin and pigmentation. C. Dependent edema: Dependent edema involves swelling due to fluid accumulation but does not necessarily cause pigmentation changes around the ankles. D. Venous insufficiency: Warm skin and brown pigmentation around the ankles are indicative of venous insufficiency, a condition where blood flow in the veins is impaired, leading to these symptoms.