Humanity now depends on only a very small set of plant species for its primary food supply. All of these grains have been selectively bred and optimized, and their populations exhibit a low level of genetic diversity. In what way does this loss of genetic diversity imperil the human race?
a. A disease could quickly run through crop fields containing the same species.
b. The resulting diet is narrow and unhealthy.
c. Disease could quickly devastate crop fields leaving few or no surviving plants.
d. The food produced is no longer organic.
