I believe that the answer would be D. I hope this helps.
There's no such story that tells "all humans turn to clay". I suppose what you mean is a story that says "humans came from clay".
The story of the latter actually came from mostly different versions of mythology, the Bible, and Quran.
According to the Greek mythology, Prometheus created men out of water and earth (water+earth(land)= mud/clay).
According to Egyptian mythology, their God created humans from clay before putting them into their mother's womb.
According to Hindu mythology, Parvati, the goddess of fertility, love, and devotion created Ganesh, the Lord of good fortune from clay and turned into flesh and blood.
The most widely known verse of the Bible says, "the Lord formed man from the dust of the ground, and breathe into his nostrils the breath of life; then man became a living soul". (Genesis 2:7)
And the Muslim's Quran as well says the same thing.
Whereas recognition of the inherent dignity and of the equal and inalienable rights of all members of the human family is the foundation of freedom, justice and peace in the world,
Whereas disregard and contempt for human rights have resulted in barbarous acts which have outraged the conscience of mankind, and the advent of a world in which human beings shall enjoy freedom of speech and belief and freedom from fear and want has been proclaimed as the highest aspiration of the common people,
Whereas it is essential, if man is not to be compelled to have recourse, as a last resort, to rebellion against tyranny and oppression, that human rights should be protected by the rule of law,
many Greek city states were under a oligarchy but they always changed there "government system"
The answers to ur question is D