The Expensive Tissue Hypothesis Includes the Argument That

The expensive tissue hypothesis includes the argument that

A) evolution occurs in the face of cost-benefits trade-offs.
B) maintaining the membrane potential consumes much energy.
C) there is a corresponding decrease in the size of the digestive tract that parallels the increase in brain size.
D) large brain sizes require high quality diets to support them, and high quality diets yield nutrients easily and adequately to smaller digestive tracts.
E) all of these.

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