The electric pulp tester might be of some value in determining whether
1. the pulp is hyperemic or hyperplastic.
2. there is a partial necrosis of the pulp.
3. there is a partial or total pulpitis.
4. the pulp is vital or nonvital.

(2) and (4)

(1) (2) (3)

(1) and (3)

All of the above.

(4) only