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Which of the following is true of machines?

A. Machines increase the amount of force required to do a task.
B. Machines reduce the total amount of work required to do a task.
C. Machines increase the total amount of work required to do a task.
D. Machines reduce the total energy required to do a task.

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Hagrid
The right answer for the question that is being asked and shown above is that: "A. Machines increase the amount of force required to do a task. " The statement that is true about machines is that A. Machines increase the amount of force required to do a task. 

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