Breeding Plants for Modern Farming Has Had Some Unintentional Consequences

Breeding plants for modern farming has had some unintentional consequences. Plant uniformity in size and maturation date is ideal for mechanical harvesting but

A) when food preferences change large plantings can quickly become unprofitable.
B) large plantings and flower uniformity discourages the action of natural pollinators.
C) when plants are highly uniform they are also uniformly vulnerable to the same disease which can rapidly destroy an entire crop.
D) All of the above