22. The Crispr/Cas9 is the approach using DNA damage and repair to modify the genomic DNA. Select the type of DNA damage and the type of repair mechanism involved in this approach. 1) single-strand breakage, 2) double-strand breakage, 3) DNA adduct, 4) inter-strand crosslinking, 5) gap-filling, 6) homologous recombination, 7) nucleotide excision repair, 8) base excision repair, 9) non- homologous end joining (A)1,6(B) 2,5(C) 3,7 (D) 4.9 (E) None of the above