Answer: A. Six-Sided Ring
The line in between indicates that there is a single bond connecting the two carbon atoms. Atoms can be bonded via single bond, double bond and a triple bond. Among the three, the single bond is the weakest, but it allows for more atoms to connect to it because it leaves 3 more pairs available for bonding.
So in summary, among all the bonds that was given, a c-c bond is the weakest and the longest.
Muscular organ that pumps blood throughout the body
