Which of the following is a true statement comparing phospholipids and triacylglycerols (fats and oils)?

• A. Both molecules contain a phosphate group.
• B. Triacylglycerols may be saturated or unsaturated, but all phospholipids are saturated.
• C. Phospholipids are the primary storage form for fats in our bodies.
• D. In nature, phospholipids occur in fused rings (sterol form), whereas triacylglycerols maintain a straight-chain form.
• E. Phospholipid molecules have a distinctly polar "head" and a distinctly nonpolar "tail," whereas triacylglycerols are predominantly nonpolar.