Joe Is Interested in Examining How the Availability of Recycling

Joe is interested in examining how the availability of recycling bins influences people's recycling behavior. Specifically, he went around his office building, noting where all the recycling bins and trash cans were. Then, before trash day, he weighed the amount of recyclable material that was in each trash can, as well as the distance that those trash cans were from recycling bins. This type of investigation best reflects what general type of research design?

A) experimental design
B) quasi-experiment design
C) nonexperimental design
D) randomized control design