If successive unit of labour are added to a piece of land while capital and technology remains constant, a point will be reached in the level of production when each additional unit of labour will add less to the output than previous units. This concept is known as
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A.
productivity of labour
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B.
law of diminishing marginal utility
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C.
law of diminishing returns
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D.
law of diminishing returns of a variable factor
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E.
internal economies of sales
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WAEC
1994
