How Is MtDNA Used to Trace Lineages

How is mtDNA used to trace lineages?

A) Mutations in mtDNA can be used to track lines of ancestry through males back thousands of generations.
B) The absence or presence of mtDNA can be used to group people into one of two lineages that descended from Mitochondrial Eve.
C) Each of the seven types of mtDNA can be identified and tracked back to one of Earth's seven main landmasses.
D) Differences in mtDNA can be used to group people into lineages and determine how long ago they shared a common ancestor.
E) The varying number of genes on mtDNA can be used to determine lineages and trace the lineages back to a shared ancestor.