In a cross between a petite yeast mutant and a wild- type strain, results showed half petite and half wild- type progeny. Which of these statements must be true of this petite mutation?

A) It is suppressive.
B) It replicates faster than wild type.
C) It has small deletions of mitochondrial DNA.
D) It is a neutral mitochondrial mutation.
E) It is a nuclear or segregational mutation.