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

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