Select the best answer for the question
18. A gene editing technology called CRISPR-Cas9 uses cellular machinery to change the cell's genetic material. How might this technology be useful in treating diseases like cancer?
A. CRISPR-Cas9 could remove any DNA damage caused by smoking
B. CRISPR-Cas9 could remove from patients the genetic mutations that cause a specific cancer before the cancer begins
C. CRISPR-Cas9 could act as an antioxidant in a person's cells, removing toxins that might otherwise damage DNA
D. CRISPR-Cas9 could be a substitute for chemotherapy