Which word group is a complete sentence?

almost all the swimmers following the rules.

never had any interesting activities.

after chris finished the chemistry experiment.

only two of the chairs matched the table.

only two of the chairs matched the table.

D. it features a reference to the supernatural being.

Explanation:

It talks about the sky god, which is a supernatural being. Myths are traditional stories from a group of people that relate them as some form of explanation to a natural phenomena or belief system (including supernatural beings and gods), in this case the relationship of the tribe with Enkai sky god which controls the rain and  drought.