Answered

How does the C horizon form?

ARainwater washed clay and minerals from the A horizon to the C horizon
BPlant roots weather pieces of rock
CPlants add organic material to the soil.
DBedrock weathers and rock breaks up into soil particles

Verified Answer :

SmokingHysteria

i am pretty sure that D is the answer. if not, then A.

I would say A because it is caused by erroded minerals.

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