Which of the following defines infiltration?Choose 2.
a.Occurs when precipitation falls on pervious areas and soaks down through the soil layer and eventually recharges groundwater
b.Occurs when precipitation falls on impervious surfaces and flows to nearby surface waterways.
c.Refers to surfaces that do not allow water to pass through the material, such as paved roadways, concrete sidewalks, rooftops, etc.
d.Occurs when precipitation falls on pervious areas and soaks down through the soil layer and eventually recharges groundwater