please check my answer thanks :)

which is true of quashing

1.the pt has signed an authorization for relase
2. medical records have been subpoenaed
3. a malpractice suit has benn filed
3. a breach nof confidentiality has occurred.

i said 2 none of the rally make sense to me

Quash means to stop or forbid.

The best answer may be the last one. If a breach of confidentiality has occurred, it's possible that the other side has filed a motion to quash that information.