Answer:
1. It involves risk. In crop rotation, investing in a season involves input of much money to buy different seedlings of the different types of crops to be planted.
2. Improper implementation can cause much more harm than good.
3. Obligatory crop diversification.
Yes and no. Mutations in experiments can be helpful to learn new things medically. At the same time negatives can come from it like stronger viruses.
I might be wrong, but I believe that it's D.) Delaware.
Sorry if it was incorrect.