Question

With reference to ecology, which among the following correctly describes the Allen's rule?

A It states that the growth and productivity of a plant is always limited by availability of a critical nutrient.
B It states that if two species have completely overlapping niches they cannot continue to coexist.
C It states that mammals from colder climates generally have shorter ears and limbs to minimize heat loss.
D None of the above.
E All the above
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