In Many Soil Profiles,the Subsoil Is High in Clay,but Is

Multiple Choice

In many soil profiles,the subsoil is high in clay,but is also quite permeable to percolating water.Why?

A) Clay generally promotes free water movement.
B) The subsoil may have an organic texture.
C) Prismatic structure may be well developed.
D) The water table may be present in the subsoil.
E) All of the above are common reasons.