Silent Mutations Have No Effect on Amino Acid Sequences Because

Silent mutations have no effect on amino acid sequences because

A) silent mutations are usually found in noncoding regions of DNA.
B) the genetic code is ambiguous.
C) silent mutations are recessive,and the presence of the dominant allele will result in a functional protein.
D) silent mutations are conditional mutagens,and their phenotypes are altered only under very restrictive conditions.
E) only a single base is involved in a series of thousands of nucleotides.