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How can workers increase the mechanical advantage of pulley systems?

A Using additional pulleys to further distribute weight
Longer rope and a higher platform will not alter the mechanical advantage of a pulley system. While decreasing size and weight will undoubtedly assist in lifting, this does not increase the mechanical advantage. The only means of increasing the advantage is through implementing additional pulleys in a pulley system.
B Using longer stretches of rope
C Using a higher platform for the load in need of lifting
D Decreasing load size and weight