The answer would be D: Russia signs a treaty with the Central Powers ending its participation in World War I.
Answer:
Desire leads to suffering. He learned this when he met a monk. At the age of 29, he finally stepped out of the royal palace. He had never seen the outside world. When, he stepped outside he saw people sick and corpses. After he met the monk, he reformed himself.
Explanation:
This comes from Buddha's story and four laws.
I believe the answer is: The establishment of sedentary village communities.
