What is “gunboat diplomacy”? a. the threat of force by a powerful nation against a less powerful nation in order to have their demands met b. the exchange of weapons by a powerful nation to a less powerful nation so they will fight a war for them c. the offer of naval support from a powerful nation to a less powerful nation to protect them from a common enemy d. the removal of weapons by a powerful nation from a less powerful nation to ensure that neighboring nations are safe