Amalgam 1. spherical alloys shrink slightly when setting. 2. lathe cut alloys expand slightly when setting. 3. admix alloys are dimensionally stable when setting. 4. high copper content alloys have improved resistance to tarnish and corrosion.
(1) and (3)
(4) only
(1) (2) (3)
All of the above.
(2) and (4)
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