Why Is Mitochondrial DNA More Mutation Prone Than Nuclear DNA

Why is mitochondrial DNA more mutation prone than nuclear DNA? (Select all correct choices)

A) there are more mitochondrial genomes than nuclear genomes, creating a higher probability of mutation
B) nuclear DNA is shielded by a double membrane whereas mitochondia are surrounded by a single membrane layer
C) nuclear DNA is more likely to have error repair than mitochondrial DNA
D) more reactive oxygen species are generated within mitochondria than within the nucleus