Answer:
C. Lack of rain or disease could destroy a food supply.
Explanation:
When people first adopted agricultural lifestyle the main challenge they had was natural causes destroying the food supplies.
This is actually a problem that exists until today, as the climate or disease of the crops can severely affect the production. In the parts of the world with a huge industry, this can be prevented.
Yet, parts that don't incorporate much of the industry into agricultural processes, like it was in the ancient times, the floods, storms, blizzards, droughts, etc. affect food supplies a lot and propose a threat to the nourishment of the people.
<u>Back in the days, people had no means of fighting the diseases that would attack plants or oppose the weather conditions, so once a disease or disaster attacks the agricultural resources they would stay without a large part of the supply for the upcoming period. </u>
