The chemical composition of soil in a certain area was found to differ from that of the bedrock beneath it. Which statement would best explain the difference in chemical composition? A. Water washed iron oxide from the A horizon to the D horizon
B. The climate, especially rain and extreme temperatures, caused the soil to develop
C. The soil layers were mature because a large amount of time had passed
D. Water, wind and gravity transported weathered particles of rock to new locations

Question 7 of 10