A. Enzymes transform complex, recalcitrant aromatic and aliphatic hydrocarbons that are not easily biodegradable to simple fatty acids, thereby accelerating biological cleanup.

• 答：酶能转化复杂的，难降解的芳烃和直链烃类化合物，并不是轻易地将它们生物降解为为简单的脂肪酸，而是加速生物清除的过程。