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Identify the incorrect statement

[A].	When material is cold worked the resulting change in material shape brings about marked changes in the grain structure	[B].	Structural changes in cold working are grain fragmentation and lattice distortion
[C].	Much greater pressures are needed for ot working than for cold working	[D].	Hot working performed on the metals is in a plastic state
[E].	Residual stresses are set up in cold working

Answer: Option C