The Distribution of Different Soil Orders Suggests All but One

The distribution of different soil orders suggests all but one of the following:

A) Most Oxisols are found in Latin America and Africa.
B) Alfisols are found mostly in semiarid areas.
C) Vertisols are most prominent in humid rainforest areas.
D) Aridisols are more extensive in Africa than in Asia and Latin America.
E) Mollisols are not very widespread in the tropics.