Which Chromosomal Mutation Would Allow Protein X to Remain Functional

Multiple Choice

Which chromosomal mutation would allow protein X to remain functional?

A) Deletion of the last 100 codons of gene X
B) An inversion of the first 100 codons of gene X
C) An inversion of the last 100 codons of gene X
D) A translocation of the last 100 codons of gene X to another chromosome
E) A duplication of gene X