Select the Best Process Listed Below for Each of the Following

Multiple Choice

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
-A small region of a protein from three species is sequenced and found to be as follows:
species X is alanine,glycine,threonine,alanine
species Y is alanine,glycine,threonine,alanine
species Z is alanine,valine,glycine,threonine,alanine
The difference in the amino acid sequence of species Z is most likely due to this.

A) Inversion
B) Deletion
C) Gene duplication
D) Translocation
E) Insertion