Read the paragraph, then choose the word that best completes the sentence. Researchers belleve that walking or biking to work improves health. However, they also admit that active commuters-those who walk or bike to work -may be healthier anyway.This is because active commuters probably also exercise in their leisure time. Other studies have shown that the countries with the highest levels of walking and biking have fitter populations. Many Americans however, are unable to be active commuters. The design of some cities makes ic Impossible. People live too far away.On average, active commuters lived 5 miles (8 kilometers) from work, Inactive commuters lived an average of 10 to 14 miles (16 to 23 kilometers) from work. For many, walking or biking to work is __ A social B essential painful incorrvenient