You may find the answer is
D) Fetal exposure to alcohol is the cause of many mental abnormalities, such as a smaller cerebrum.
A, while is good isn't as specific and uses basic language.
B is better but doesn't use examples as well as D.
C uses language that could be found offensive, therefore probably not the best for explaining this subject.
The amino acids in a polypeptide chain are linked by peptide bonds. Once linked in the protein chain, an individual amino acid is called a residue, and the linked series of carbon, nitrogen, and oxygen atoms are known as the main chain or protein backbone.
To prevent H20 from contaminating the washed area, as the water runs off the elbow rather than the hands that will be used in the surgery
