Which of the following will nondestructively add a new property to the object obj? $($select all that apply$)$

Group of answer choices

const newObj $=\{...$obj, newKey: "newVal"$\}$;

I don't know

const newObj $=\{...$obj$\}$;

newObj.newKey $=$newVal$$;

const newObj $=$ obj;

newObj.newKey $=$newVal$$;