Concept:A major medical advance is best understood as a new approach to treating a disease, not as a complete cure for all cases.
Explanation:The statement points to a significant breakthrough in treating cancer.
Such a breakthrough suggests that doctors have found a fresh and effective method of treatment.
Among the options given, this is best expressed by saying a new method in cancer treatment was introduced.
It does not mean that all cancer problems have been solved or that the person was simply praised.
It also does not mean only that a new drug was thought of, because the focus is on the treatment method.
Therefore, the most appropriate interpretation is option B.
Answer:B. introduced a new method in cancer treatment