What is the theme of a whole nation of people

Bella is going to write a research paper. she chose sports as her topic, but her teacher said she must narrow or limit her topic. choose the topic that limits the broad topic of sports the most. a) a history of sports in the united states b) a history of tennis c) rules and etiquette of tennis d) training and equipment for outdoor sports

Which of these phrases is an example of understatement?

What rhetorical device is used in the following sentence? with confidence in our armed forces - with the unbounded determination of our people - we will gain the inevitable triumph - so us god.