Which of these contributed to the development of agriculture between 9000 and 1000 BCE?
a. The end of the last ice age and the resulting climate change
b. The rise of large mammals that could not be easily hunted
c. The development of democratic forms of government
d. The extinction of several species of plants
"a. The end of the last ice age and the resulting climate change" would be the best option from the list, since the range and size of most of the animals that were available before did not change greatly.
