During a well-woman exam, a lump was palpated in the patient’s right breast. The patient undergoes further testing, which reveals a tumor that is 40 mm in diameter. A right axillary lymph node is determined to be involved but no other lymph nodes or distant metastases are noted. The lymph node is ipsilateral to the tumor and is movable. Which of the following describes the stage of breast cancer in this patient?

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