Which cultural group once preserved food by burying kimchi pots underground during the winter?
A. Turkmen
B. Chinese
C. Koreans
D. nomadic Mongolian herders

C. Koreans

Explanation:

The Cultural groups who were famous for storing food underground in kimchi pots earlier were the Koreans, during winter season.

When the temperatures came soaring down to sub –zero and the coldness of the winter crippled into the food.

It was the  only way to preserve or store the food by storing it in the kimchee pots that kept the food intact and helped it to survive for long period of time.

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c

Explanation:

they make pots and stuuf underground so the clay can dry

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.