The King opens the meeting of the Estates-General (May 5, 1789) this is all know
The correct answer is letter C.
Explanation: A simple and inexpensive way to improve soil fertility is by installing green manure or mulching, which adds organic materials and nitrogen to the soil, increases biological activity and recovers leached (washed) nutrients to the deepest layers.
The Shang Dynasty (1046 B.C.E-1600C.)
