A mutation during DNA replication causes a G to be inserted after the first base of the codon for tryptophan.How will this affect the growing polypeptide chain?

A)It will not be affected.
B)Elongation will stop prematurely.
C)There will be a single amino acid substitution.
D)The reading frame will be shifted to the left,and the wrong amino acids will be added from this point on.
E)An extra amino acid will be added,but the reading frame will not be affected.