How might environmental manipulation of a crop have unexpected consequences?
a.
the new crop may require more water than the original.
b.
the crop may harm the environment.
c.
the yield may be reduced.
d.
all of the above

The correct answer is:

all of the above

Explanation:

Manipulation of a crop has several unanticipated consequences; such that the new crop may require more water, it may harm the environment and its yield may be limited.

Environmental administration of a crop can not only have unexpected consequences but also have a contradictory result on the environment as well. The crops provided might be of inferior degree than expected. The amount of crop that grows can also be less. More water might be required for the crops to grow and the yield declined.

substitution is the answer in this case