Consider the paths represented by the numbered sequence of edges on the graphs below. Which path represents an Euler circuit? 
Definitions:
Gig Economy
A labor market characterized by the prevalence of short-term contracts or freelance work as opposed to permanent jobs.
Economic Options
The range of possible choices available to individuals, businesses, and governments in the allocation of resources to meet needs and desires.
Deep Integration
The extent of integration in economic relations and policies beyond removal of tariffs to include harmonization of legal and regulatory systems.
Shallow Integration
Refers to the removal of tariffs and border barriers to facilitate trade between countries, without significantly harmonizing domestic laws and policies.
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