A) Selection will favor individuals that prefer to breed in the good habitat, so the world will contain individuals that only breed in the good habitat and learning will be unnecessary.
B) Learning will only lead to breeding in the good habitat 50% of the time, so it will not be favored.
C) In a fixed world, there is no relationship between past experience and future conditions, so learning is not beneficial.
D) Learning is too costly in a fixed world.
E) The benefits of learning in a fixed world are too unpredictable.