1-C. As more cities invest in making walking and bicycling easier, the popularity of non-motorized travel should also increase.As more cities invest in making walking and bicycling easier, the popularity of non-motorized travel should also increase.
2-C. However, the popularity of using non-motorized transportation depends on many factors, including social and economic issues.However, the popularity of using non-motorized transportation depends on many factors, including social and economic issues.
3-C. (3) The word burgeoning in Paragraph (2) is closest in meaning to losing popularity.(3) The word burgeoning in Paragraph (2) is closest in meaning to losing popularity.