The Nye Committee, officially known as the Special Committee on Investigation of the Munitions Industry, was a United States Senate committee (April 12, 1934 – February 24, 1936), chaired by U.S. Senator Gerald Nye (R-ND).
The answer is A because the significance of gunboat diplomacy is military threats which is a foreign policy used to scare the less powerful nation so that they follow the most powerful nations demands.