How did communication improve during the Qin dynasty? O A standardized writing system was created.
O An organized postal system was established.
O A new system of military message codes was developed.
A ban against criticizing the government was passed.

During the Qin Dynasty, paper began to be invented and the writing system of China was standardized.

Explanation:

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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.