Given below is information about a network. Choose one of the following three$$ options: the network is definitely a$$ tree; the network is definitely not a$$ tree; the network may or may not be a tree$($more information is$$ needed$).$ Accompany your answer with a brief explanation for your choice.

The network has $14$ vertices $($Upper D through Upper Q$),$ and there is only one path connecting Upper L and Upper Q$.$