B) This mutation is a deletion mutation resulting in a frameshift. This would result in a different reading of the codons following the mutation, causing a different translation from the original strand. The protein being created could be abnormally short, abnormally long, and will most likely not be functional.
Frameshift mutations, depending on their placement, tend to create massive changes in protein structure by changing all of the codons following the mutation. Frameshift mutations are apparent in severe genetic diseases such as Tay–Sachs disease and they increase susceptibility to certain cancers and classes of familial high cholesterol levels.
The answer to this question is b