The three steps from solids to points are

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Question:

The three steps from solids to points are

(a) solids-surfaces-lines-points           

(b) solids-lines-surfaces-points

(c) lines-points-surfaces-solids          

(d) lines-surfaces-points-solids

Solution:

(a) The three steps from solids to points are solids-surfaces-lines-points.

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