Any differences among "in any instance", "in any event", and "in any circumstance"?
Could you please tell me differences among the following phrases in the following sentece.

1) in any instance,
2) in any event
3) in any circumstance

Regarding the artworks that were stolen during the Holocaust, an Oscar-winning actress said that the right thing to do in every instance is to return the art to its rightful owners at a Senate hearing.

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Question

Any differences among "in any instance", "in any event", and "in any circumstance"?
Could you please tell me differences among the following phrases in the following sentece.

1) in any instance,
2) in any event
3) in any circumstance

Regarding the artworks that were stolen during the Holocaust, an Oscar-winning actress said that the right thing to do in every instance is to return the art to its rightful owners at a Senate hearing.

Thank you for reading my question. 
I would appreciate it if you give me any comment on it.

Answer

It is better without any of them...
the right thing to do is to return the art

1) in any instance:   rarely used.
2) in any event:  eg. In any event... (or "regardless of what happens") ...I don't think we should go.
3) in any circumstance:   usually used in a negative sense, but usually with "under": Do not open that door under any circumstance!!!