One end of a light rope is tied directly to the ceiling. A man of mass \( M \) initially at rest...

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One end of a light rope is tied directly to the ceiling. A man of mass \( M \) initially at rest on the ground starts climbing the rope upto a height \( \ell \). From the time he starts at rest on the ground to the time he is hanging at rest at a height how much work was done on the man by the rope?
(a) 0
(b) \( M g \ell \)
(c) \( -M g \ell \)
(d) It depends on how fast the man goes up.
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