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.
Answer:
Stonehenge is the answer.
Answer:
c. was a substantial political calamity for the South.
Explanation:
Lincoln was assasinated by John Wilkes Booth on 1865, right near the end of the Civil War. Booth sympathized with the confederates, who lost the war, and wanted to avenge them.
Soon after that, the South surrended, which led to political and economical problems.
So the corret answer is:
c. was a substantial political calamity for the South.
