Answer:
Correct answer is by sending Soviet troops to Afghanistan.
Explanation:
Brezhnev doctrine was focused on the reaction of Soviet troops in the areas where the Socialism was endangered.
That is why the last option is correct as Soviets reacted with military assistance in Afghanistan.
All other options are not correct as they are showing the readiness of Soviet Union to lower the tension in certain period of crisis.
From my Knowledge,
If the head of the executive branch e.g. (The President) were subjected to a subpoena, then they have the right to claim executive privilege to withhold information from the other branches.
The concept of the city-state was an important innovation and development (and invention) of Art because these cities, such as Uruk or Lagash, are some of the earliest known complex urban centers, and the settlement of people in them made necessary the construction of walls, temples, and burial sites that today are recognized as archeological vestiges of exceptional significance.
Furthermore, since the people that had settled in them had at their disposal food resources and an administrative class that took care of their needs and secured their welfare, artistic and craft production flourished in them.
