TPO 21 The origins of agriculture - 英檢

再請教一題TPO21

It is unclear why hunter-gatherers in different parts of the world
independently developed agriculture at roughly the same time.

Answer Choices
A. One obstacfe to the transition from a nomadic lifestyle to the sedentary
lifestyle required by agriculture was that hunter-gatherers had not developed
storage techniques.
B. It seems unlikely that agriculture emerged in response to a food shortage
brought on by a worldwide population crisis that developed once the whole
world was occupied.
C. The origins of agriculture maybe linked to climate change at the end of the
last ice age, but this does not explain why earlier climatic instability had
not led to agriculture.
D. The only available means of understanding the social organization and
technical abilities of ancient hunter-gatherer societies is the study of
contemporary hunter-gatherers.
E. One recent theory suggests that the invention of agriculture was made
possible by the integration of various mental capacities in the human mind.
F. Little is known about why only some societies that adopted agriculture
rapidly progressed to using metal tools, becoming literate, and developing a
state.

答案是 BCD

為什麼是要選D選項而不選E選項呢?
我在文章中只找到第六段有一點點D的意思
但是好像沒有E在第五段明顯

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