Which step in the actomyosin cycle involves ATP hydrolysis?

• A. Step 5: Myosin power stroke pulls actin towards the M disc.
• B. Step 1: Myosin binds tightly to actin without ATP.
• C. Step 3: ATP hydrolysis causes the myosin head to change to a high-energy state.
• D. Step 2: ATP binds to myosin, disrupting actin-myosin interaction.

Answer: (C)