Highly filled, hybrid, posterior composite resins are CONTRAINDICATED as a posterior restorative material in cases of
1. cusp replacement.
2. bruxism
3. lack of enamel at the gingival cavo-surface margin
4. inability to maintain a dry operating field.

All of the above.

(1) (2) (3)

(1) and (3)

(2) and (4)

(4) only