Answer:
construct a fitness trail for biking, walking and running around one of the centrally located lakes in town ( B )
Explanation:
the option you choose is right because the small town been the " The laziest town in the country" means that most of the residents in the town were less active physically or they are becoming less active physically.
The least expensive and most effective way to resolve this physical inactivity and in order to promote healthy physical activities in the town constructing a fitness trail for biking, walking and running around is the best suggestion to help the town