What Does the Deep Red Color in This Soil Profile

Multiple Choice

What does the deep red color in this soil profile suggest?

A) Magnesium is present because the area was recently submerged beneath a shallow sea
B) Glaciers have scoured the landscape
C) Iron-bearing minerals have been leached downward
D) The soils are water logged most of the time
E) There is an extreme amount of organic material throughout the profile