What happens to a springs force if you stretch stretch it more

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

What does the line most likely show about the setting of the scene?

What is the italicized part in the sentence , all of the operators are efficient.