I need help ASAP please Why are grassland and forest soils good for farming?

A.
A layer of permafrost prevents the decay of organic material that enriches the soil.

B.
There is enough water to promote chemical weathering, but not enough to wash away nutrients.

C.
Too much water promotes chemical weathering and washes away nutrients.

D.
There is not enough rainfall to promote chemical weathering or retaining nutrients.

Question

I need help ASAP please Why are grassland and forest soils good for farming?	
 
 A.
A layer of permafrost prevents the decay of organic material that enriches the soil.
 
 B.
There is enough water to promote chemical weathering, but not enough to wash away nutrients.
 
 C.
Too much water promotes chemical weathering and washes away nutrients.
 
 D.
There is not enough rainfall to promote chemical weathering or retaining nutrients.

anonymous · Answer

I do believe it the answer is A.
:P