Mrs. Smith's treatment for cancer has showed promise. The first treatment session has yielded a 50 percent reduction in the number of tumor cells. Identify the statement that best explains why only one more treatment session will not be enough to eradicate all the cancer cells in Mrs. Smith.
A. Cancer cells grow at a faster rate than normal cells.
B. Cancer treatment eradicates cells by percentage, not number.
C. Cancer treatment only prolongs a patient's life and cannot completely cure a patient.
D. Cancer cells can only be eliminated over the course of several weeks.
Answer: B
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