For generating a Coon's surface we require

1.	For generating a Coon's surface we require
A.	a set of grid points on the surface
B.	a set of grid control points
C.	four bounding-curves defining the surface
D.	two bounding curves and a set of grid control points
Answer» D. two bounding curves and a set of grid control points

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For generating a Coon's surface we require

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