Final answer:
When a false positive for breast cancer occurs, confirmatory tests are performed to ensure accuracy before any treatment, like surgery, is pursued. A biopsy is necessary for a definitive diagnosis.
Step-by-step explanation:
If a false positive occurs regarding a breast cancer test, the next step is B) Confirmatory tests are conducted to rule out errors. Secondly, a definitive diagnosis of cancer often requires a biopsy before any treatment can begin. This is because early diagnosis and treatment are crucial for curing cancer, though not all cancers can be cured. If the confirmatory tests indicate that the initially positive result was indeed a false alarm, no immediate cancer treatment is started. Instead, further monitoring or testing might be recommended based on the individual's risk factors and medical history. Surgery and other treatments such as chemotherapy, radiation, and immunotherapy are only initiated after a confirmed diagnosis.