Which tool might be used to limit imports from cuba but maintain exports to cuba

Sanctions

Explanation:

Sanctions are often seen as a preliminary measure from governments to restrain a certain country who has not aligned to international treaties or has had diplomatic tensions with them. These do not include leaving a complete treaty without effect but rather aiming at a certain part of that treaty, like restricting imports from a certain country until diplomatic relations normalize. This, however, does not affect exporting businesses, as they are able to regularly send their products to that particular country unless that particular country decides it will also block imports.

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.