NEW YORK (AP) — The leader of the group representing most American nuns challenged the Vatican's reasons for disciplining her organization, insisting that raising questions about church doctrine should not be seen as rebellion.

Sister Pat Farrell, president of the Leadership Conference of Women Religious, said Monday that Catholics should be able to search for answers about faith without fear.

"I don't think this is a healthy environment for the church," Farrell said in a phone interview. "We can use this event to help move things in that direction — where it's possible to pose questions that will not be seen as defiance or opposition."