The statement that offers the BEST support for Theodore Roosevelt's "Big Stick" diplomacy is:
D
"Roosevelt was successful in bringing parts of Latin America under control of the United States, including Cuba and the Panama Canal."
This statement directly reflects the essence of "Big Stick" diplomacy, which involved the use of military power and intervention to achieve U.S. goals in Latin America and assert American influence in the region. The mention of specific examples, such as Cuba and the Panama Canal, highlights the practical outcomes of his diplomatic approach.