CRISPR systems have been used in cancer treatments to
A. deliver radiation to individual cells within large, dense tumors.
B. inactivate faulty genes that are responsible for the cell cycle, causing them to slow down or stop cell division.
C. activate genes that are responsible for the cell cycle, causing them to speed up cell division to replace cells lost to other cancer treatments.
D. deliver packets of chemicals to tumors via genetically engineered red blood cells.
Answer: B
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