Which of the following are examples of the functions of enzymes?

• A. A lactase enzyme breaking down lactose sugar in the small intestine.
• B. A DNA polymerase enzyme synthesizing new strands of DNA.
• C. A lipase enzyme breaking down fats (lipids) in the small intestine.
• D. A helicase enzyme unraveling DNA so it can be replicated.
• E. All of the above.