Which of the following statement$(s)$ is/are correct about muscle tissue?

• A
  Each muscle is made of many long,cylindrical fibres arranged in parallel arrays.
• B
  Muscle fibres contract (shorten) in response to stimulation,then relax (lengthen) and return to their uncontracted state in a coordinated fashion.
• C
  Muscles play an active role in all movements of the body.
• D
  All of the above