Taking measures to prevent any extension of communist rule to other countries was called this guided president truman's foreign policy.

Containment--Truman's foreign policy was based on containing the spread of communism to other countries.

Under Truman's foreign policy, the focus became stopping the spread of communism. The Marshall Plan was used to fund vulnerable countries and prevent falling to communism. The creation of NATO was also used to protect democratic countries in the case of a threat. 

The correct answer is C) by presenting a metaphor of a dirt road being paved.

In "The Intelligent Planet," Michio Kaku developed the idea of how the internet will evolve by presenting a metaphor of a dirt road being paved.

Dr. Michio Kaku is a physicist, a writer, and a speaker, renown by his work on futuristic issues. In "The Intelligent Planet," Michio Kaku developed the idea of how the internet will evolve by presenting a metaphor of a dirt road being paved. This means that internet evolution will be increasing by portions as if a dirt road is paved, one portion after the other. He also compares it as a magic mirror that has the capacity of immediate response.

Kaku has written successful scientific books such as "The Future of Mind", "Physics of the Future", "HYperspace," and "Visions."