In the design of a removable partial denture, the objectives of surveying the diagnostic cast are to
1. determine the path of insertion.
2. locate tooth surfaces that can act as guiding planes.
3. locate retention areas.
4. locate the height of contour.
All of the above
(1) (2) (3)
(1) and (3)
(2) and (4)
(4) only
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