GMAT Critical Reasoning (CR) | Re: CR Revision: In response to the increasing cost of producing energy

The conclusion of the argument is that renewable sources of energy, chiefly solar and wind, will be less risky for certain utilities than nonrenewable sources, such as oil and gas. The basis for this claim is that the renewable sources will provide stable, low-cost supplies of energy, whereas the prices for nonrenewable sources will fluctuate according to availability. We are asked to find an
assumption underlying this argument. In order for this argument to be valid, it must in fact be true that
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