A brief reading of the sentences suggests that the paragraph is about the inadequacy of laws about commercial activities in space in the wake of rapid technological developments in the same field. All sentences, other than 4, talk about this inadequacy or highlight why the laws are inadequate. Option 4 is out of context here, as it talks about the US disrespecting international law. It does not relate to the inadequacy of space law for commercial activities, and hence, is the answer.