B Horizons Are Often ________ in Color Because of ________

Multiple Choice

B horizons are often ________ in color because of ________.

A) dark; accumulation of humus
B) dark; it is made of dark colored, mafic minerals
C) reddish or yellowish; the minerals they contain are often chemically oxidized
D) reddish or yellowish; the minerals they contain are often chemically reduced