Question 1160723
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Yes you are correct. The answer is A.


A Hamiltonian path is one where each vertex is used only once. You can stop at any vertex you want (it doesn't have to be the first starting point). A circuit is one where you end up where you started. Combining those two concepts, a Hamiltonian circuit is what choice A describes. 


In contrast, a Euler circuit is one where every edge is used exactly once and you end up where you started. An Euler path is where you use each edge only one time, and you end up somewhere other than the starting point.
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