Chimezie is performing an initial examination of a patient with type 2 diabetes mellitus. The patient’s most recent hemoglobin A1C is 6.7%. During inspection of the right foot, the therapist observes a small ulcer on the plantar surface beneath the fifth metatarsal head. The patient reports progressively limiting walking activities because of discomfort in the involved foot. Which of the following examination procedures is MOST important for the therapist to perform?

A) Measure the patient’s maximum ambulation distance

B) Inspect the medial ankle for additional ulceration

C) Test protective sensation using a 10-g monofilament

D) Measure capillary blood glucose before continuing the examination

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