The bolded sentence in the selection above signifies a shift in tone. Which sentence below best explains Kennedy's tone before the shift? He is offering help to friendly and democratic nations in our part of the world. His tone is promising. He is stating that the United States will support people and governments in the Americas. His tone is regretful. He is suggesting that other countries are poor. His tone is sorrowful. He is warning other countries that the United States will support peaceful revolutions. His tone is threatening.