Which of the following became a challenge for humans adopting an agricultural lifestyle? A.
It was harder to produce enough food for a community.

B.
People needed to migrate more to get enough food.

C.
Lack of rain or disease could destroy a food supply.

D.
The population declined as a result of fewer births.

C

Explanation:

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answer: president kennedy is vowing to protect freedom in this paragraph.

the outcome of 1970 oil crisis in united states was that, they began to search ways on how to reduce oil.

in 1970 was a period when there were energy and oil crisis. those who were major centers for industrialization were forced to keep way from supplying of petroleum.

some of the result of this crisis was economic growth became stagnant because prices of oil surged.

due to the increased prices some countries like mexico and norway benefited.