Which figure depicts a punctuated equilibrium model of evolution? 
Definitions:
Allocative Efficiency
A state of resource allocation where goods and services are distributed according to consumer preferences and in a way that maximizes social welfare.
Marginal Cost
The uptick in cost associated with producing an extra unit of a product or service.
Allocative Efficiency
A state of the economy in which production represents consumer preferences; in other words, every good or service is produced up to the point where the last unit provides a benefit to consumers exactly equal to the cost of producing it.
Product Mix
The total range of products that a company offers for sale, encompassing different lines, variations, and services to meet consumer needs.
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