What description fits with the trickle-down theory?

Question

Quizplus · Accepted Answer

The trickle-down theory is an economic theory that suggests that creating economic growth and wealth at the top of society will eventually benefit everyone in society, including the poor, as the benefits trickle down to lower-income individuals through job creation and higher wages.

Option A is describing the process of water moving through soils and is not related to the concept of trickle-down theory. 
Option B is describing the process of waste percolating down in a landfill and is not related to the concept of trickle-down theory. 
Option D is describing waterfalls flowing in the fall season and is not related to the concept of trickle-down theory.

What Description Fits with the Trickle-Down Theory