Why don't certain mutations affect the amino acid sequence in protein synthesis?

A- the amino acids are so close in structure, it doesn’t matter

B- there are multiple amino acids for each codon combination

C- each amino acid has multiple codon combinations

C- each amino acid has multiple codon combinations

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.