Select All of the Following Statements That Are True

Multiple Choice

Select all of the following statements that are true:

A) Illuviation, the process of dissolution and downward mobilization of minerals in the soil, causes zones of the soil to become leached.
B) Another name for leaching of soils is eluviation.
C) Solifluction is a process where iron oxidizes, resulting in soils that appear a rusty color.
D) Illuvial zones are portions of the soil profile where minerals are deposited.
E) Bioturbation always causes a soil to become more heterogeneous.