The author's attitude toward the theory of a cold prehistory of life can best be described as ______.

A．describing how the principles of classical chemistry were developed
B．initiating a debate about the kinds of chemical reaction required for the development of life
C．explaining how current research in chemistry may be related to broader biological concerns
D．clarifying inherent ambiguities in the laws of classical chemistry

A．In both, reacting molecules have to rise over the barrier between the two wells.
B．In both types of reactions, a transition is made from the bottom of one potential well to the bottom of another.
C．In both types of reactions, reacting molecules are able to go through the barrier between the two wells.
D．In neither type of reaction does the rate of a chemical reaction depend on its activation energy.