Evaluate the impact of a mutation that disrupts the arrangement of sarcomeres within myofibrils.

• A. Muscle contraction would remain unaffected.
• B. Myofibrils would become more efficient in contraction.
• C. Sarcoplasmic reticulum function would be enhanced.
• D. Muscle contraction efficiency would decrease due to disorganized sarcomere arrangement.

Answer: (D)