How does the biochemical composition of sphingomyelin relate to the structure of the myelin sheath?

• A. Sphingomyelin's hydrophobic nature prevents it from integrating into the myelin sheath.
• B. Sphingomyelin's amphipathic nature allows it to form the bilayer structure of the myelin sheath.
• C. Sphingomyelin's fatty acid chains disrupt the myelin sheath structure.
• D. Sphingomyelin's polar head groups dissolve the myelin sheath.