Answer:
A. no more fear of drought or crop diseases
B. a move to large, single-crop farms
Explanation:
The introduction and wide adoption of scientific agriculture since the mid-19th century has made a great improvement in US economic growth. UU. This evolution was facilitated by the Morrill Law and the Hatch Law of 1887 which develops in each state a land in concession to the university (with the mission of teaching and the study of agriculture) and a federal one - financed by the state and by the national government.
Similarly, managing a monoculture was more profitable and had better growth conditions, this was due to the increase in crops in the south and west of the USA.
