Answer:
The correct answer would be D.The population will still be susceptible to genetic mutations.
As the entire field is planted with genetically identical seeds of a single type of crop, it would have the least biodiversity and variations.
It would make the entire population vulnerable to any change in an environment.
Thus, the correct option should be option D as mutation is a random process that can occur at any time in a lifetime.
Mutations can be caused by various chemical compounds, radiations, and by errors in DNA replication.
It can occur in both sexually and asexually reproducing organisms.