Why did the youth revolt occur in the late 60s in Denmark

In the mid-1960s youth around the world became increasingly aware of social issues such as war and starvation. They found many causes such as anti-poverty, anti-war, and anti-censorship to rally behind. Many students protested against the Vietnam War, which dragged on until 1975.

Explanation:

the answer wold be b) travel among nations should be regulated by an international organization

the answer is b for brother