1-C. People in Britain walk more frequently now compared to several decades ago.People in Britain walk more frequently now compared to several decades ago.
人々は、英国のダヨ、歩きます、より頻繁にダヨ、今ではダヨ、数十年前に比べてダヨ。
2-C. More people are traveling farther and more frequently today than before.More people are traveling farther and more frequently today than before.
4-C. Given this background, one might expect that more people are traveling farther and more frequently.Given this background, one might expect that more people are traveling farther and more frequently.