Which of these statements correctly indicates a metabolic limitation humans have regarding double-bond configurations?

• A. Human enzymes convert cis double bonds into saturated bonds preferentially, making cis fats equivalent to saturated fats metabolically.
• B. Humans lack efficient enzymatic systems to convert trans double bonds into cis configurations, so trans fats tend to accumulate and disrupt metabolism.
• C. Humans can freely interconvert cis and trans double bonds using desaturases in the gut microbiome during digestion.
• D. Humans produce high levels of isomerases that convert all dietary trans fats into beneficial omega‑3 cis fatty acids.

Answer: (B)