阅读下面A、B两篇短文, 掌握其大意, 从题中所给的A、B、C三个选项中，选出可以 填入相应空白处的最佳答案。

Do you often run outdoors to keep healthy? Have you ever thought about 1 running helps to clean up the earth? Sometimes a creative mind can bring us a win-win situation. Plogging(跑步捡垃圾), a new way to 2, began in Sweden. The name "plogging" comes from two words一the Swedish word "plocka", which means "to pick up", and the word 'jogging", which means "to run slowly". A Swedish man called Erik started the movement. He saw rubbish here and there when 3 to work each day. He became 4 about the dirty environment and decided not to go to work by bike any more. So, he began to run to work and pick up the rubbish at the same time. To his 5 , more and more people followed him and soon plogging became popular.