A MRNA Sequence That Codes for a Protein Is 5′-CAA

A mRNA sequence that codes for a protein is 5′-CAA GGG UAC-3′.Which of the following choices does NOT cause a change in the amino acid sequence?

A) 5′-CAA GCG GUA C-3′
B) 5′-CAG GGG UAC-3′
C) 5′-GAA GGG UAC-3′
D) 5′-CAA GGG UAA-3′
E) These are all mutations.