In Physics, the term "reference frame" includes

(A) the boundary of a physical system.
(B) the identity of the observer.
(C) the places that distances are measured from.
(D) a table that measurements are written in.



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In Physics, the term "reference frame" includes

(A) the boundary of a physical system.

No.
That would be more like a picture frame.

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In Physics, the term "reference frame" includes

(C) the places that distances are measured from.

Yes.
It includes some other things too.

Check the other answers.

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In Physics, the term "reference frame" includes

(D) a table that measurements are written in.

No.
That would be a data table.

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In Physics, the term "reference frame" includes

(B) the identity of the observer.

No. --- However, different observers
might use different frames of reference.

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