Respuesta :
The best way to revise the second sentence is, Maybe we should move to another topic because arguing is not getting us anywhere.
This option has the best grammatical and structural form in uses of connectors and verb-noun agreement.
Because this is not getting us anywhere, maybe we should move to another topic. We should move to another topic maybe because this is not getting us anywhere. Maybe we should move to another topic we can agree on. This is not getting us anywhere. (all of these options have inconsistencies in structure and complicates in extense the conveyance of the main idea.