Which of the graphs below have Euler circuits? 
Definitions:
Business Ownership
Refers to the legal possession and control over a business entity by an individual or group.
Corporations
Legal entities that are separate from their owners, with the ability to own property, enter into contracts, and be sued.
Joint Venture
A business arrangement where two or more parties agree to combine their resources for accomplishing a specific task, sharing profits, losses, and control.
Specified Purpose
A defined goal or objective that a project or venture aims to achieve.
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