Which of the following, if true, most logically completes the reasoning in the passage?
Frogs that live in tropical rain forests typically lay their eggs in small, temporary forest pools. Clearing areas of forest for pasture destroys some frog habitat, but most pastures contain pools that are more permanent than the forest pools, and frogs of some rare rain-forest species have been observed laying eggs in such pools. Frogs' eggs, however, will probably not do as well when laid in pasture pools as they would have in the forest, because __________.
A) in times of drought, there are fewer forest pools, and many of the pasture pools dry up.
B) adult rain-forest frogs are often brightly colored, indicating to predators that the frogs are poisonous or bad-tasting
C) many species of rain-forest frogs have become extinct because the area of forest in which they lived has been completely cleared
D) even in the pastures, pools are usually shaded partially or completely from direct sunlight by vegetation growing around them
E) the longer lasting a pool is, the more likely it is to harbor predators that would eat frogs' eggs
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