Dental amalgams that are made from alloys containing 6% copper, compared to those made from alloys containing 13% copper
1. are more resistant to tarnish and corrosion.
2. demonstrate less creep or flow.
3. demonstrate less marginal breakdown in clinical service.
4. generally have lower compressive strength.

(4) only

All of the above

(1) (2) (3)

(1) and (3)

(2) and (4)