What Is the Difference Between Synthetic and Natural Fertilizers

Multiple Choice

What is the difference between synthetic and natural fertilizers?

A) There is no difference chemically, just that synthetics are mixed in different proportions.
B) Synthetics come from artificial processes such as the Haber process.
C) Natural fertilizers are all mined.
D) Natural fertilizers are all obtained from decay of organic matter.
E) none of the above