What Is the Difference Between Mismatch Repair and Nucleotide Excision

What is the difference between mismatch repair and nucleotide excision repair?

A) In mismatch repair, several nucleotides are replaced, whereas in nucleotide excision repair it is just one.
B) In mismatch repair, one nucleotide is replaced, whereas in nucleotide excision repair several nucleotides are replaced.
C) In mismatch repair, several nucleotides are replaced, whereas in nucleotide excision repair the sugar phosphate backbone is fixed.
D) In mismatch repair, the sugar phosphate backbone is fixed, whereas in nucleotide excision repair, several nucleotides are replaced.