78.Using the genetic code shown below, predict what type of mutation has occurred in Peter’s epithelial cells.
Normal allele 5'–GGAAUGAAACAGGAACCC–3'
Mutant allele 5'–GGAAUGAACCAGGAACCC–3'

(A) a point mutation, Glu to Val;
(B) a point mutation, Lys to Asn;
(C) a frameshift mutation;
(D) addition of a new stop codon.